It is the time of the year when Indians hit the roads to distribute gifts and sweets to friends and family, visit colorful “Diwali bazars” and party as they gear up to celebrate the main Hindu festival of Diwali on November 7. But in the Indian capital, there is a party spoiler: a deadly haze of pollution that has prompted calls to minimize exposure to the dirty air and is making some pack up and leave the city during the festival.

Grey smog shrouds New Delhi and satellite towns as winter approaches and authorities have advised citizens to avoid strenuous outdoor activity, take only short walks, shut windows, reduce use of private vehicles and wear masks as a precaution.

A range of emergency measures has also been announced to reduce air pollution, such as a temporary ban on construction activity and coal and biomass based industries starting Thursday.

The measures kick in as the level of PM2, the tiny particulate matter that can dangerously clog lungs exceeded by more than six times the safe limit set by the World Health Organization. Earlier this year, WHO named Delhi as the world’s most polluted megacity — the city and its surrounding towns are home to 19 million people.

“There are pollution hotspots in the city where we have seen levels that are hitting serious levels,” says Anumita Roy Chowdhury, Executive Director, Research and Advocacy at the Center for Science and Environment in New Delhi. “But at least the action has started and we are hoping the emergency response will help.”

The pollution in the city and surrounding towns is a toxic mix of of dust, fumes from vehicles, burning of waste and polluting industries, and has been exacerbated with explosive growth. It worsens at this time of the year as farmers set fire to thousands of hectares of farmland in neighboring states, Diwali revelers set off firecrackers and still winter air keeps pollutants hovering over the city.

Authorities have launched a campaign to prevent farmers from burning crop residue, which helps them prepare the fields for the next harvest without incurring heavy labor costs. The acrid smoke from the fields billows towards Delhi, becoming one of the major triggers for the city’s deadly smog.

State authorities are optimistic the number of fires has been reduced as the government offers subsidies on equipment that enables farmers to plant the new crop with the stubble still in the fields and imposes fines on those who still light up the residue on their fields. But thousands of resentful farmers continue to burn the stubble, saying it is easier to pick up a matchstick and pay the penalty rather than invest in the equipment.

Others grumble the additional expense is cutting into already slim farm profits and leaving their crop more vulnerable to pests like rats.

“We don’t like scorching mother earth, but only when you work at the ground level you know the challenges you face,” said Vinod Kumar, who has a 16-hectare farm in Karnal in neighboring Haryana state. He does not find it viable to plant the new crop with the stubble still standing in the fields. “The taller stubble has to be set on fire.”

Even as crop fires rage, an ease on a ban on firecrackers by the Supreme Court has intensified New Delhi’s pollution worries. The top court rejected calls for an outright ban and said “green crackers” would be allowed for a two-hour window on Diwali.

But many in the country, including shops selling firecrackers, appeared clueless about what is an environmentally safe firework. They are doing brisk business — many in the city are loath to give up the age-old custom, which they see as an intrinsic part of Diwali celebrations despite several campaigns urging people to stay away from firecrackers.

Doctors are already advising people suffering from respiratory problems to leave the city and those who can afford to heed the warning are taking it seriously.

New Delhi resident, Pradeep Bhargava, who has suffered bouts of asthma, is taking no chances after last year when pollution spiked to its worst-ever level around Diwali and prompted doctors to declare a “medical emergency” and authorities to shut schools. “The pollution is the major factor that we are heading to the hills, but five days out of the city won’t really help,” he said. “We have to breathe the dirty air through the winter.”

Many environmentalists agree and point out that emergency measures taken during the smog season will not fix Delhi’s pollution crisis. “Focus now will really have to shift more towards round-the year plan so that those systemic reforms take place so that by next winter we begin to see more substantial changes,” said Chowdhury from the Center of Science and Environment.

 
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New research strengthens the case that people used the chocolate ingredient cacao in South America 5,400 years ago, underscoring the seed’s radical transformation into today’s Twix bars and M&M candies.

Tests indicate traces of cacao on artifacts from an archaeological site in Ecuador, according to a study published Monday. That’s about 1,500 years older than cacao’s known domestication in Central America.

“It’s the earliest site now with domesticated cacao,” said Cameron McNeil of Lehman College in New York, who was not involved in the research.

The ancient South American civilization likely didn’t use cacao to make chocolate since there’s no established history of indigenous populations in the region using it that way, researchers led by the University of British Columbia in Canada said.

But the tests indicate the civilization used the cacao seed, not just the fruity pulp. The seeds are the part of the cacao pod used to make chocolate.

Indigenous populations in the upper Amazon region today use cacao for fermented drinks and juices, and it’s probably how it was used thousands of years ago as well, researchers said.

Scientists mostly agree that cacao was first domesticated in South America instead of Central America as previously believed. The study in Nature Ecology & Evolution provides fresh evidence.

Three types of tests were conducted using artifacts from the Santa Ana-La Florida site in Ecuador. One tested for the presence of theobromine, a key compound in cacao; another tested for preserved particles that help archeologists identify ancient plant use; a third used DNA testing to identify cacao.

Residue from one ceramic artifact estimated to be 5,310 to 5,440 years old tested positive for cacao by all three methods. Others tested positive for cacao traces as well, but were not as old.

How cacao’s use spread between South America and Central America is not clear. But by the time Spanish explorers arrived in Central America in the late 1400s, they found people were using it to make hot and cold chocolate drinks with spices, often with a foamy top.

“For most of the modern period, it was a beverage,” said Marcy Norton, a historian at the University of Pennsylvania and author of “Sacred Gifts, Profane Pleasures: A History of Tobacco and Chocolate in the Atlantic World.”

The chocolate drinks in Central America often contained maize and differ from the hot chocolate sold in the U.S. They did not contain milk, Norton said, and when they were sweetened, it was with honey.

By the 1580s, cacao was being regularly imported into Spain and spread to other European countries with milk being added along the way. It wasn’t until the 1800s that manufacturing advances in the Netherlands transformed chocolate into a solid product, Norton said.

Michael Laiskonis, who teaches chocolate classes the Institute of Culinary Education, said he’s seeing a growing interest in cacao flavors, indicating a return to a time when chocolate wasn’t just an ingredient buried in a candy bar.

He said he tries to incorporate chocolate’s past into his classes, including a 1644 recipe that combines Mayan and Aztec versions of drinks with European influences.

“It’s something that’s always been transforming,” he said.
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A meticulous re-creation of a three-decade-old study of birds on a mountainside in Peru has given scientists a rare chance to prove how the changing climate is pushing species out of the places they are best adapted to. 

Surveys of more than 400 species of birds in 1985 and then in 2017 have found that populations of almost all had declined, as many as eight had disappeared completely, and nearly all had moved to higher elevations in what scientists call “an escalator to extinction.” 

“Once you move up as far as you can go, there’s nowhere else left,” said John W. Fitzpatrick, a study author and director of the Cornell Laboratory of Ornithology. “On this particular mountain, some ridgetop bird populations were literally wiped out.”

It’s not certain whether the birds shifted ranges because of temperature changes, or indirect impacts, such as shifts in the ranges of insects or seeds that they feed on. 

These findings, published Monday in the Proceedings of the National Academy of Sciences, confirm what biologists had long suspected, but had few opportunities to confirm. The existence of a 1985 survey of birds on the same mountain gave scientists a rare and useful baseline. 

Past research has documented habitats of birds and other species moving up in elevation or latitude in response to warming temperatures. But Mark Urban, director of the Center of Biological Risk at the University of Connecticut, who was not involved in the study said it was the first to prove what climate change models predicted: that rising temperatures will lead to local extinctions.

“A study like this where you have historical data you can go back to and compare is very rare,” said Urban. “As long as the species can disperse, you will see species marching up the mountain, until that escalator becomes a stairway to heaven.”

In 1985, Fitzpatrick established a basecamp alongside a river running down a mountain slope in southeastern Peru, aiming to catalog the habitat ranges of tropical bird species that lived there. His team spent several weeks trekking up and down the Cerro de Pantiacolla, using fine nets called mist nets to catch and release birds, and keeping detailed journals of birds they caught, spotted or heard chirping in the forests.

Two years ago, Fitzpatrick passed his journals, photos and other records to Benjamin Freeman, a postdoctoral fellow at the Biodiversity Research Centre at the University of British Columbia. Freeman, who has been researching tropical birds for more than a decade, set out to recreate the journey in August and September of 2017. Using old photos of mountain views, his team located the same basecamp. 

Freeman largely recreated Fitzpatrick’s path and methodology to see what had happened in the intervening years, a period when average mean temperatures on the mountain rose 0.76 degrees Fahrenheit (0.42 degrees Celsius). Because the mountain lies at the edge of a national park, the area hadn’t been disturbed. 

In addition to unfurling 40-foot (12-meter) mist nets on the slopes, Freeman’s team placed 20 microphone boxes on the mountain to record the chirps of birds that might not easily be seen.

“We found that the bird communities were moving up the slope to reach the climate conditions to which they were originally adapted,” said Freeman, the lead author of the study. Near the top of the mountain the bird species moved higher by 321 feet (98 meters), on average.

“We think temperature is the master-switch in explaining why species live where they do on mountain slopes,” said Freeman. “A huge majority of species in our study were doing the same thing.”

Birds adapted to live within narrow temperature bands — in regions without wide seasonal variations — may be particularly vulnerable to climate change, Fitzpatrick said.

“We should expect that what’s happening on this mountaintop is happening more generally in the Andes, and other tropical mountain ranges,” he said. 

 
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Demand for bitcoin could single-handedly derail efforts to limit global warming because the increasingly popular digital currency takes huge amounts of energy to produce, scientists said on Monday.

Producing bitcoin at a pace with growing demand could by 2033 defeat the aim of limiting global warming to 2 degrees Celsius, according to U.S. research published in the journal Nature Climate Change.

Almost 200 nations agreed in Paris in 2015 on the goal to keep warming to “well below” a rise of 2°C above pre-industrial times.

But mining, the process of producing bitcoins by solving mathematical equations, uses high-powered computers and alto of electricity, the researchers said.

“Currently, the emissions from transportation, housing and food are considered the main contributors to ongoing climate change,” said study co-author Katie Taladay in a statement. “This research illustrates that bitcoin should be added to this list.”

Mining is a lucrative business, with one bitcoin currently selling for about $6,300 (4,900 British pounds).

In 2017, bitcoin production and usage emitted an estimated 69 million metric tons of carbon dioxide equivalent, the researchers said.

That year, bitcoin was involved in less than half of 1 percent of the world’s cashless transactions, they said.

As the currency becomes more common, researchers said it could use enough electricity to emit about 230 gigatons of carbon within a decade and a half. One gigaton is equal to one billion metric tons of carbon.

“No matter how you slice it, that thing is using a lot of electricity. That means bad business for the environment,” Camilo Mora, another co-author, told the Thomson Reuters Foundation.

Bitcoin mining, however, is becoming more energy efficient, said Katrina Kelly-Pitou, research associate at the University of Pittsburgh.

She said bitcoin miners are moving away from sites such as China, with coal-generated electricity, to more environmentally friendly utilities in Iceland and the United States.
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NASA’s Parker Solar Probe is now closer to the sun than any spacecraft has ever gotten.

Parker on Monday surpassed the record of 26.6 million miles (43 million kilometers) set by Helios-2 back in 1976. And it will keep getting closer to the sun until it flies through the corona, or outer atmosphere, for the first time next week, passing within 15 million miles (24 million kilometers) of the solar surface.

Parker will make 24 close approaches to the sun over the next seven years, ultimately coming within just 3.8 million miles (6 million kilometers).

Launched in August, Parker is on track to set another record late Monday night. It will surpass Helios-2’s speed record of 153,454 miles per hour (247,000 kilometers per hour), relative to the sun.
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The World Health Organization says air pollution kills hundreds of thousands of children every year and puts the physical health and neurological development of hundreds of millions of other youngsters at serious risk. The WHO is issuing a report titled “Air pollution and child health: Prescribing clean air” on the eve of the U.N. agency’s first-ever Global Conference on Air pollution and Health.

The World Health Organization reports more than 90 percent, or nearly 2 billion children under the age of 15, breathe toxic air every day. The WHO says debilitating problems associated with air pollution begin at conception and continue until adolescence.  

The report notes pregnant women exposed to polluted air are likely to give birth prematurely and have low-weight babies. A WHO scientist and expert on air pollution, Marie Noel Brune Drisse, warns that many babies will have neurodevelopment problems, resulting in lower IQs. 

“The fact is that air pollution is stunting our brains, even before we are born,” said Drisse. “The fact that it is leading to diseases that we may not be able to see immediately but look at much later in life like adult diseases. Our lung function and our respiratory systems are being altered during our development.” 

Drisse says this can lead to chronic respiratory and cardiovascular diseases, as well as certain types of cancers later in life. In 2016, the report estimated that 600,000 children died from acute lower respiratory infections caused by polluted air. It said the heaviest toll is paid by children in low- and middle-income countries. The report found that the highest death rates among children between the ages of 5 and 14 from both ambient and household air pollution occur in the African region.

The report says switching to clean cooking and heating fuels and technologies could save the lives of many children. It says other measures for reducing the toxic impact of air pollution include moving away from fossil fuels.

The report recommends the use of cleaner, renewable energy sources, less dependence on private cars in favor of public transportation, and better waste management systems. WHO officials say the benefits from implementing such measures will be felt almost immediately.
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Dogs are well known and valued for their ability to smell everything from drugs, to bombs to contraband electronics. But scientists at Lancaster University have trained them to sniff out illnesses, specifically malaria. And that could be game changing in the fight to stop the spread of the disease. VOA’s Kevin Enochs reports.
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The European Union’s environmental agency says air pollution is slowly improving across the continent but still exceeds the bloc’s limits and guidelines from the U.N. health agency.

The European Environment Agency on Monday issued its 2018 report on air quality and said emissions from road traffic, agriculture, energy production, industry and households are churning out pollutants like particulate matter, nitrogen dioxide and ground-level ozone.

Agency head Hans Bruyninckx said: “Air pollution is an invisible killer and we need to step up our efforts to address the causes.”

He said Europe must “redouble its efforts to reduce emissions caused by transport, energy and agriculture and invest in making them cleaner and more sustainable.”

The report was based on more than 2,500 monitoring stations across Europe in 2016, the latest available data.

 
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The fields grow shoulder-high with weeds out the window of Bob Fitzgerald’s Ford pickup. The drive through Fitzgerald’s neighborhood in Princess Anne, Maryland, is a tour of dying forests and abandoned cropland.

“A few years ago, all of this was a good farm,” he said. “And it’s gone, as a farm.”

The land along the shores of the Chesapeake Bay has been sinking for centuries. But climate change is adding a second whammy. As the sea level rises, salt water is seeping into the water table, deeper and deeper inland. The ground is becoming too salty for crops to grow. 

Maryland’s Eastern Shore is home to some of the oldest farms in America. Fitzgerald’s dates back to 1666. He’s seen big changes in his lifetime.

“You just can’t believe how it’s taking things over in the last 15 or 20 years,” Fitzgerald said. “I can show you land around here that people raised tomatoes on when I was a little boy. And now it’s gone.”

Around the world, scientists warn that coastal farms are under threat from rising seas and encroaching salt water. A World Bank report estimates rice yields in coastal areas of Bangladesh may fall by more than 15 percent by 2050. Another report found that hundreds of millions of people will likely be displaced by rising waters.

Kate Tully aims to help keep Eastern Shore farmers in business as the seas rise. 

The University of Maryland agroecologist had seen the “ghost forests” of dying pine trees killed by the increasingly salty soil. When she started looking at maps, she said, “I realized that a lot of the land that was upslope wasn’t just forests, it was farms. And so I started poking around and talking to people and asking if this was an issue on farms.”

It was. But “a lot of people hadn’t really been talking about it” outside their own communities, she said. 

With a new $1.1 million research grant from the U.S. Department of Agriculture, Tully and her colleagues are aiming to give farmers options.

Test plots scattered around the Eastern Shore are trying out different crops.

“One thing that I’m very pleasantly surprised about is how well the sorghum does,” Tully said. The grain crop may be a good choice to feed the roughly 600 million chickens raised in the region each year. It’s a hardy crop that can handle salt, drought and heavy rains.

Tully’s group is also testing barley to supply the growing microbrew industry; the oilseed canola; switchgrass, a possible biofuel crop; and salt-tolerant soybeans. 

Just being able to grow a crop isn’t enough, though. It also has to be profitable. An economist on the team will be running the numbers.

“I never want to recommend something that would make farmers go out of business,” Tully said.

But farming the land may not be the best option. Another choice is to give in to nature and turn fields into wetlands. 

Wetlands attract waterfowl. Waterfowl attract hunters.

“There’s money in duck hunting,” Tully said. Hunting clubs will pay farmers for exclusive access to wetlands on their property. “It can be a lucrative pathway.”

Tully and her colleagues are just getting started. It will be a few years before they have recommendations for what will sustain communities that have been farming this land for centuries. 

“There’s a lot of history there. And as these seas rise, some of that history is going underwater,” Tully said. “And I find that to be a pretty moving, pretty motivating reason to try to figure out what we can do for these farmers.”
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As climate change raises sea levels, salty ocean water is pushing its way inland. That’s ruining valuable farmland around the world. On Maryland’s Eastern Shore, once-productive fields are succumbing to the saline waters. So researchers are looking for ways to keep farmers in business as the land changes. VOA’s Steve Baragona has more.
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Insurance shoppers likely will have several choices for individual health coverage this fall. The bad news? There’s no guarantee they will cover certain doctors or prescriptions.

Health insurers have stopped fleeing the Affordable Care Act’s marketplaces and they’ve toned down premium hikes that gouged consumers in recent years. Some are even dropping prices for 2019. But the market will still be far from ideal for many customers when open enrollment starts Thursday.

Much of the insurance left on the marketplaces limits patients to narrow networks of hospitals or doctors and provides no coverage outside those networks.

Plus these plans can still be unaffordable for people who don’t receive help from the ACA’s income-based tax credits, and they often require patients to pay several thousand dollars toward their care before most coverage starts.

“People understand that things are kind of screwed up,” said Chicago-area broker Robert Slayton. “My objective is to give them what reality is, to give them options. Their job is to choose what may work.”

The ACA expanded coverage to millions of Americans when it established state-based marketplaces where people can buy a plan if they don’t get insurance through work or qualify for government programs like Medicaid. But the expansion has been rough.

Several insurers pulled back from these markets after being swamped with higher-than-expected costs. Many that remained jacked up prices or started limiting the hospitals and doctors included in their coverage networks.

Those narrow networks give insurers leverage to negotiate better rates that can lead to lower coverage prices, and the consulting firm McKinsey & Co. has found that the quality of their hospitals is comparable to broader networks.

Plans with narrow networks will cover necessary specialists like cardiologists, but they often exclude out-of-state care providers or academic medical centers, which tend to be more expensive.

They can pose problems for patients who have more than one physician or want to keep a doctor covered under a previous plan.

Jodi Smith Lemacks is nervous about changing or losing her job because that could mean cutting off her 15-year-old son Joshua from heart specialists he’s seen his entire life. The Richmond, Virginia, resident said she looked last year for options on the ACA’s marketplace to trim the coverage bill she pays through work.

She didn’t find any plans that would cover his current doctors, including some at the Children’s Hospital of Philadelphia, who treat his congenital heart disease.

“The issue with kids like Joshua is, it really matters, it’s life or death where you go,” she said.

Plans with some form of a limited network made up more than half of the choices offered for 2017 on the ACA’s marketplaces, according to the latest numbers from McKinsey. That coverage was particularly common in the price range where most consumers shop, which is within 10 percent of the lowest-priced plan.

These plans grew more common from 2014 to 2017, especially in cities where insurers could choose between competing hospital networks. But that trend has since stabilized, said McKinsey’s Jim Oatman.

Even so, brokers aren’t expecting narrow networks to go away. In some markets like St. Louis, they were the only option shoppers had among 10 plan choices for this year.

The narrow networks are grouped by hospital systems, and broker Kelly Rector has several customers who see doctors in different systems. She advises them to pick their coverage based on which doctor is most important and drop the others for in-network options.

Plans with narrow networks can make it harder to simply get to the doctor, especially if it’s a specialist.

Wichita Falls, Texas, residents with individual coverage have to drive nearly two hours to see an in-network neurologist, insurance agent Kelly Fristoe said. That can be stunning to customers who buy an individual plan after having coverage through work, which tends to come with wider networks.

“They don’t like it,” Fristoe said. “They’re forced to make a change, and they have to go establish themselves with a new specialist.”

Debbie Dean lives 15 minutes from a suburban Chicago hospital, but she’ll have to travel about an hour to an in-network location if she wants surgery on her injured shoulder. Dean couldn’t find affordable coverage that included the nearby hospital when she bought her 2018 plan.

Instead, she settled on insurance that comes with a $6,000 annual deductible she has to pay before most coverage starts. That, plus the travel distance, keeps her from seeking help.

“I’m grateful that I have coverage, but it’s really cruddy coverage,” she said. “I sit here with my shoulder killing me every day.”

Narrow-network plans with their lower prices can be good for shoppers who aren’t tied to a doctor and just want protection from big medical bills, said Paul Rooney, a vice president with the online insurance broker eHealth.

“They’re younger and they’re healthier and they’re thinking, ‘I’m going to get this coverage in case I hurt my knee playing basketball,’” he said.

But it can be tough for consumers when shopping to know if there’s a decent selection of doctors nearby until they need one.

People who “have the most to lose from having a narrow-network plan are those who have something unexpected happen to them,” said Daniel Polsky, a University of Pennsylvania economist.
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