Firing the advisory panel and opting not to pursue a more stringent particulate standard were in keeping with the administration of President Donald Trump’s dim view of environmental regulation. By one tally compiled by The New York Times, 72 regulations on air, water and soil pollution, climate change and ecosystems have been canceled or weakened, with an additional 27 in progress. EPA leadership has sidelined or ignored research by agency scientists, and career staff are censoring their reports to avoid terms like “climate change” out of fear of repercussions from political staff. Many of the changes involve narrowing the scope of science, and scientists, that contribute to policy, experts said.