Air quality levels are expected to reach unhealthy levels throughout the San Francisco Bay Area, and residents have been warned to avoid exposure.
Floodwater is easily contaminated with sewage, oil and chemicals after hurricanes.
It remains unclear how far-reaching this additional catastrophe could become, as Houston begins the work of cleaning and rebuilding after Hurricane Harvey.
It could be weeks before authorities have a realistic assessment of the damage caused by chemical spills after Harvey.
The report came a day after Donald Trump issued new measures to roll back the Obama administration's anti–climate change policies.
Metals in air pollution have been linked to damage in children's lungs.
Professor says more research is needed to know whether the higher rate of autism is due to spraying itself or higher exposure to mosquito-borne illnesses.
The chemical has been linked to everything from ADHD to breast cancer.
"This burden is preventable," one scientist said.
Spreading human feces on agricultural fields is common practice.
Conservative publications are pushing the return of DDT, but experts say that's ridiculous.
Diesel Cars Made by Mercedes-Benz, Honda, Mazda and Mitsubishi Also Pollute More Than Emissions, Tests Revealed
Honda's models spew as much as six times the amount of NOx that was originally reported.
The agency's scientists warned against setting the limit at this level.
The testing, sparked by the Volkswagen cheating scandal, begins today.
Breathing air clean enough to meet the EPA's standards raises one's risk of heart disease death by 12 percent, according to a new study.
Despite false media reports, Moore, who offered then refused to drink herbicide, is an environmentalist with an unusual history.
People from the Argentinian Andes can metabolize arsenic more quickly than most.