GLORIA DICKIE WORSENING outdoor air pollution and toxic lead poisoning have kept global deaths from environmental contamination at an estimated 9 million per year since 2015 – countering modest progress made in tackling pollution elsewhere, a team of scientists reported Tuesday. Air pollution from industrial processes along with urbanization drove a 7% increase in pollution-related deaths from 2015 to 2019, according to the scientists’ analysis of data on global mortality and pollution levels. "We're sitting in the stew pot and slowly burning," said Richard Fuller, a study co-author and head of the global nonprofit Pure Earth. But unlike climate change, malaria, or…