Dicamba, an herbicide sold by agribusiness giants Monsanto, BASF and DowDupont, doesn’t just kill weeds. Last year, according to a University of Missouri survey, dicamba damaged an estimated 3.6 million acres of soybeans across 25 states when it drifted from farms planted with seeds genetically engineered to resist the chemical onto regular soybean fields.

A new report from the American Lung Association (ALA) finds 133.9 million Americans at risk from air pollution – much of it ozone pollution that is worsening significantly due to warmer temperatures. The ALA’s 2018 "State of the Air" report found that the four in ten Americans (41.4 percent) who live in counties with unhealthful levels of either ozone or particle pollution are at greater risk for premature death and other serious health effects such as lung cancer, asthma attacks, cardiovascular damage, and developmental and reproductive harm.

On February 12, the federal government announced a multimillion-dollar settlement with Shell Oil over a long list of air pollution violations at a petrochemical refinery in Norco, Louisiana. In a statement, EPA Administrator Scott Pruitt said the settlement "demonstrates EPA's dedication" to pursuing pollution violations and protecting public health.