"Reaction in the Pacific Northwest was swift to President Trump’s proposed cuts to the cleanup budget at the Hanford Site. Sen. Ron Wyden, a Democrat from Oregon, called the proposed $230 million cut “downright dangerous for everyone who lives near the Columbia River.”"

"A Teflon chemical that last year contaminated a North Carolina river that provides drinking water to a region of more than 200,000 people also has been detected at a well under a Chemours facility in West Virginia, according to the U.S. Environmental Protection Agency."

"California officials and clean air advocates are increasingly concerned the Trump administration may attempt to unravel a key program to drive down greenhouse gas emissions from automobile fleets while also jeopardizing the ability of California and other states to set pollution standards stronger than federal rules."

"Toxic substances including arsenic may be leaking from unlined pits and contaminating groundwater at hundreds of coal ash storage facilities nationwide, according to an analysis by the environmental law organization Earthjustice."

"Governments are slowly advancing efforts to reduce climate and health impacts of soot."

"Governments are poised this week to begin discussing rules to curb black-carbon pollution from ships, after nearly seven years of preparation. The sooty emissions, which are produced by diesel engines, warm the climate and harm human health.

"The rescue of the planet’s protective ozone layer has been hailed as one of the great success stories of modern environmental regulation — but on Monday, an international team of 22 scientists raised doubts about whether ozone is recovering as expected across much of the world."

"Eleven Democratic state attorneys general on Tuesday sued President Donald Trump’s administration over its decision to delay implementation of an Obama-era rule that would have expanded the number of wetlands and small waterways protected by the Clean Water Act."

"Due to heavy fertilizer use, California's Central Valley is behind up to 41 percent of the state's emissions of nitrogen oxide — an air pollutant and climate-warming gas".

"A large proportion of California's nitrogen oxide—which can cause harmful ozone and a variety of health impacts—comes from heavy fertilizer use in the state's Central Valley, according to a new study.

"As Interior Secretary Ryan Zinke prepared to travel to the Carolinas to discuss offshore drilling, state attorneys general condemned the Trump administration’s plan to expand development of oil and gas in the Atlantic and Pacific oceans as “outrageous” and “reckless.”"

As climate change melts Arctic permafrost, it will release toxic mercury, scientists say.