When it comes to measuring global warming, humidity, not just heat, matters in generating dangerous climate extremes, a new study finds. 

Researchers say temperature by itself isn’t the best way to measure climate change’s weird weather and downplays impacts in the tropics. But factoring in air moisture along with heat shows that climate change since 1980 is nearly twice as bad as previously calculated, according to their study in Monday’s Proceedings of the National Academy of Sciences. 

The energy generated in extreme weather, such as storms, floods and rainfall, is related to the amount of water in the air. So, a team of scientists in the United States and China decided to use an obscure weather measurement called equivalent potential temperature — or theta-e — that reflects “the moisture energy of the atmosphere,” said study co-author V. “Ram” Ramanathan, a climate scientist at the University of California San Diego’s Scripps Institution of Oceanography, and Cornell University. It’s expressed in degrees, like temperature. 

“There are two drivers of climate change: temperature and humidity,” Ramanathan said. “And so far, we measured global warming just in terms of temperature.” 

But by adding the energy from humidity, “the extremes — heat waves, rainfall and other measures of extremes — correlate much better,” he said. 

That’s because as the world warms, the air holds more moisture, nearly 4% for every degree Fahrenheit (7% for every degree Celsius). When that moisture condenses, it releases heat or energy, “that’s why when it rains, now it pours,” Ramanathan said. 

In addition, water vapor is a potent heat-trapping gas in the atmosphere that increases climate change, he said. 

From 1980 to 2019, the world warmed about 0.79 degrees Celsius (1.42 degrees Fahrenheit). But taking energy from humidity into account, the world has warmed and moistened 1.48 degrees Celsius (2.66 degrees Fahrenheit), the study said. And in the tropics, the warming was as much as 4 degrees Celsius (7.2 degrees Fahrenheit). 

When judging by temperature alone, it looks like warming is most pronounced in North America, mid-latitudes and especially the poles — and less so in the tropics, Ramanathan said.

But that’s not the case, he said, because the high humidity in the tropics juices up storm activity, from regular storms to tropical cyclones and monsoons. 

“This increase in latent energy is released in the air, which leads to weather extremes: floods, storms and droughts,” Ramanathan said. 

University of Illinois climate scientist Donald Wuebbles, who wasn’t part of the study, said it makes sense because water vapor is key in extreme rainfall. “Both heat and humidity are important,” Wuebbles said. 

Environmental scientist Katharine Mach of the University of Miami, who wasn’t part of the study, said “humidity is key in shaping the impacts of heat on human health and well-being, at present and into the future.” 
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A group of pharmaceutical companies and distributors agreed to pay $590 million to settle lawsuits connected to opioid addiction among Native American tribes, according to a U.S. court filing released Tuesday. 

The agreement is the latest amid a deluge of litigation spawned by the U.S. opioid crisis, which has claimed more than 500,000 lives over the past 20 years and ensnared some of the largest firms in American medicine. 

The companies involved in the latest agreement include Johnson & Johnson (J&J) and McKesson, according to a filing in an Ohio federal court by a committee of plaintiffs in the case. 

Native Americans have “suffered some of the worst consequences of the opioid epidemic of any population in the United States,” including the highest per-capita rate of opioid overdoses compared with other racial groups, according to the filing from the tribal leadership committee. 

“The burden of paying these increased costs has diverted scarce funds from other needs and has imposed severe financial burdens on the tribal plaintiffs.” 

J&J, McKesson and the other two companies in the accord – AmerisourceBergen and Cardinal Health – previously agreed to a $26 billion global settlement on opioid cases. 

J&J said Tuesday the $150 million it agreed to pay in the Native American case has been deducted from what it owes in the global settlement. 

“This settlement is not an admission of any liability or wrongdoing and the company will continue to defend against any litigation that the final agreement does not resolve,” the company said.

It was unclear if the other companies would take their portion under the latest agreement from the global settlement. 

‘Measure of justice’ 

Robins Kaplan, a law firm negotiating on the behalf of the plaintiffs, said the agreement still must be approved by the Native American tribes. 

“This initial settlement for tribes in the national opioid litigation is a crucial first step in delivering some measure of justice to the tribes and reservation communities across the United States that have been ground zero for the opioid epidemic,” Tara Sutton, an attorney at the firm, said in a statement. 

Douglas Yankton, chairman of the North Dakota-based Spirit Lake Nation, said the money from the settlement would “help fund crucial, on-reservation, culturally appropriate opioid treatment services.” 

Steven Skikos, an attorney representing the tribes, told AFP they are pursuing claims against other drugmakers. 

“This is hopefully the first two of many other settlements,” he said. 

All tribes recognized by the U.S. government, 574 in all, will be able to participate in the agreement, even if they have not filed lawsuits. 

The settlement is separate from a prior agreement that resulted in $75 million in payments to the Cherokee Nation from three distribution companies, including McKesson. 

Many of the lawsuits regarding the opioid crisis have centered on Purdue Pharma, the manufacturer of OxyContin, a highly addictive prescription painkiller blamed for causing a spike in addiction. 

A judge in December overturned the company’s bankruptcy plan because it provided some immunity for the owners of the company in exchange for a $4.5 billion payout to victims of the opioid crisis. 

The litigation wave also has swamped pharmacies owned by Walmart, Walgreens and CVS, which a jury found in November bear responsibility for the opioid crisis in two counties in Ohio. 

 
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A single lightning bolt that leapt across three U.S. states has been identified as the longest ever, the U.N. weather agency said Tuesday. Dubbed a megaflash, the rare low-rate horizontal discharge covered 768 kilometers (477 miles) between clouds in Texas and Mississippi in April 2020.

It was detected by scientists using satellite technology and its distance – beating the previous record by 60 kilometer – confirmed by a World Meteorological Organization committee.

“That trip by air[plane] would take a couple of hours and in this case the distance was covered in a matter of seconds,” WMO spokesperson Clare Nullis said.

Another megaflash that occurred above Uruguay and Argentina in June 2020 also set a record, as the longest-lasting at 17.1 seconds, the WMO said.

While these two newly cataloged megaflashes never touched the ground, they serve as a reminder of the dangers of a weather phenomenon that kill hundreds of people a year.

“We reiterate our message: when thunder roars, when you see lightning — go indoors. Don’t seek shelter in a beach hut, don’t stand under a tree,” Nullis said. 
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The World Health Organization warns of health care risks posed by discarded COVID-19 equipment and is calling on nations to better manage their systems for disposing of the used gear.

Tackling the COVID-19 pandemic requires the use of huge quantities of personal protective equipment or PPE and the use of needles and syringes to administer vaccines, among other essential products.

A new World Health Organization global analysis finds the quantities of health care waste generated by the goods are enormous and potentially dangerous. Maggie Montgomery is the technical officer for water, sanitation and health in the WHO Department of Environment.

She says COVID-19 has increased health care risks in facilities at up to 10 times previous volumes.

“If you consider that two in three health care facilities in the least developed countries did not have systems to segregate or safely treat waste before this pandemic, you can just imagine how much burden this extra waste load has put on health care workers, on communities, especially where waste is burned,” Montgomery said.

The report finds the hazardous disposal of COVID-19 waste potentially exposes health workers to needle stick injuries, burns and pathogenic microorganisms, air pollution and many dangers associated with living near poorly managed landfills and waste disposal sites.

WHO experts analyzed approximately 87,000 tons of PPE that were shipped to needy countries between March 2020 and November 2021 through a joint U.N. emergency initiative. Most of the equipment, they say, was expected to end up as waste.

The report provides an initial indication of the scale of the COVID-19 waste problem that exists only within the health sector, which is enormous. Montgomery says it does not look at the volumes of waste being generated in the wider community.

“In terms of the waste generated by the public, in particular masks. For example, in 2020, there were 4.5 trillion additional disposable masks thrown away by the public, which led to six million tons of additional waste,” Montgomery said. “So, certainly, the public is generating the most. At the same time, we feel that the health sector has a really important role and there are many concrete things that can be done to reduce, unnecessary use of PPE.”

WHO recommendations for safer and more environmentally sustainable waste practices include using eco-friendly packaging and shipping, safe and reusable gloves and medical masks, and investing in non-burn waste treatment technologies.
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