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California wildfire pollution killed 52,000 in a decade: study
Pollution from California wildfires killed more than 52,000 people in a decade, a new study claimed Friday, as the western United States girds for a hot summer that could bring more blazes.
Vast areas of forest and grassland are scorched every year in California and other parts of the country, causing millions of dollars of destruction and sometimes costing lives.
But researchers say particulate matter released by the fires has a devastating effect on local populations that far outweighs the number of deaths directly attributable to them.
A study led by Rachel Connolly of the University of California Los Angeles found these tiny airborne pollutants -- known as PM2.5 because they are 2.5 micrometers or less -- are killing large numbers of people.
The team looked at data from 2008 to 2018 and isolated the amount of PM2.5 released specifically by wildfires, as opposed to that generated by other sources, like transport and manufacturing.
They found at least 52,480 premature deaths could be attributed to this specific pollution. The cost of treating people affected by the pollutants was calculated at $432 billion.
"The importance of wildfire management will only grow in the coming decades as aridification intensifies with climate change and more regions are susceptible to fires," the researchers wrote in their paper, published Friday by Science Advances, a peer-reviewed journal of The American Association for the Advancement of Science.
"These findings have direct implications for California, a state at the forefront of climate policy development with many fire-prone regions and a diverse population to protect," they added.
"Growing the evidence base on health impacts from wildfires and other climate-related exposures is critical."
The study comes as much of California and other parts of the American West are sweltering under the first heatwave of the year.
Temperatures as high as 120 degrees Fahrenheit (49 Celsius) scorched Death Valley on Thursday, while Las Vegas was broiling under 111 F heat.
The early summer heatwave has raised concerns that the fire season could be a fierce one in 2024 after two relatively benign years, thanks to wet winters.
For now, the blazes breaking out have tended to be grass fires, which are easier to control and do not burn as hot.
But as the summer heats up and the larger shrubs and trees start to dry out, they become vulnerable to downed power lines or discarded cigarettes.
After around 20 years of drought, and in a climate that is slowly aridifying, California has seen an alarming number of megafires this century -- 18 of the 20 biggest fires in the state's recorded history have occurred in the last two decades.
Wildfires are a natural -- and necessary -- part of the life cycle of wilderness.
But climate change, caused by humanity's unchecked burning of fossil fuels that pumps greenhouse gases into the atmosphere, is making them bigger, hotter and more unpredictable.
C.Garcia--AMWN