ClimateWire: Particulates, ozone and smog coupled with extreme temperatures form a more dangerous health threat than these problems would be individually, researchers have found.
The combined threat is apparent in both hot and cold ends of the temperature spectrum.
Scientists have long understood that air pollution is a serious health threat. The World Health Organization reported that in 2012, 1 in 8 deaths worldwide stemmed from air pollution.
These concerns were the foundation of sweeping legislation...