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Study Warns Of Cascading Health Risks

Global Warming:Study Warns Of Cascading Health Risks Study Warns Of Cascading Health Risks From The Changing Climate

By c0ns_lt3th. Global Warming. Published at Thursday, January 10th, 2019 - 16:54:49 PM.

Crop yields are declining. Tropical diseases like dengue fever are showing up in unfamiliar places, including in the United States. Tens of millions of people are exposed to extreme heat.

These are the stark findings of a wide-ranging scientific report that lays out the growing risks of climate change for human health and predicts that cascading hazards could soon face millions more people in rich and poor countries around the world.

The report, published Wednesday in the public health journal The Lancet, incorporates the work of 24 academic institutions and United Nations agencies and follows a major climate assessment issued last week by the United States government. The two studies represent the most serious warnings to date that climate change is posing a series of interconnected health risks for the global population.

“We don’t see these health impacts individually,” said Kristie L. Ebi, a professor of global health at the University of Washington and one of the authors of the Lancet study. “We see them jointly. We see them coming at communities all at the same time.”

Among the biggest threats humans face in a warming climate is heat stress, which not only kills people directly but can also lead to kidney and cardiovascular disease, the report noted. Higher temperatures can also diminish people’s ability to work, particularly in agriculture, leading to tens of billions of hours of lost labor capacity each year.

Most worrying, according to the authors, is the compounding effect of extreme weather events that are exacerbated by climate change. Heat waves, floods and storms can batter the very public health systems that are meant to help people, the report says. A failure to rein in emissions, it warns, could lead to disasters that “disrupt core public health infrastructure and overwhelm health services.”

The American report, called the National Climate Assessment, says that extreme rainfall could overwhelm the nation’s ailing water and sewer systems, contributing to shortages of drinkable water and increasing exposure to gastrointestinal disease. In some parts of the country, like Florida and Texas, higher temperatures will be a boon to a type of mosquito that transmits the viruses that cause dengue, Zika, chikungunya and yellow fever.

Echoing these warnings on Wednesday, the United Nations Secretary General, António Guterres, urged world leaders to swiftly curb greenhouse gas emissions as they had promised under the Paris climate accord three years ago. Nine out of 10 people breathe unsafe air, according to the World Health Organization, Mr. Guterres said. “Meeting the Paris Agreement commitments could save more than a million lives a year,” he said.

Cutting emissions from sources like coal-fired power plants and diesel-burning trucks would also result in enormous savings to public health systems, the Lancet authors said. “Doing that now would be good for us, it would be good for our livelihoods and would be good for the planet,” Dr. Ebi said.

Extreme heat

In 2017, 157 million more people were exposed to heat-related health risks than in 2000, the report said. And that was before the scorching summer of 2018.

In England and Wales, for instance, over a 15-day period of exceptionally high temperatures this summer, there were 700 “excess deaths” compared to a comparable period in previous years, said Nick Watts, the report’s lead author.

Some of the most vulnerable people are in relatively prosperous countries in Europe and the Eastern Mediterranean region, particularly because these places have large populations of older people living in cities. In both regions, more than 40 percent of people over the age of 65 were found to be at risk.

In the United States, the National Climate Assessment found that some of the largest increases in heat-related mortality in future years would occur in the Northeast. By midcentury, there could be 50 to 100 excess deaths per one million people due to heat in that region, the report said.


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