"Pennsylvania environmental regulators are pursuing a record $4.5 million fine against a gas driller over what they describe as a major case of pollution from a leaking waste pit."

"The Environmental Protection Agency moved on Tuesday to increase the amount of data made available to the public on regulated chemicals."

"PORTLAND — New threats and a legal settlement prompted the U.S. Fish and Wildlife Service proposal today to list West Coast populations of fisher as threatened under the Endangered Species Act."

"A federal water study commissioned by the Cuomo administration as it weighed a key decision on fracking was edited and delayed by state officials before it was published, a Capital review has found."

"On his farm in Iowa, Matt Peters worked from dawn to dusk planting his 1,500 acres of fields with pesticide-treated seeds. 'Every spring I worried about him,' said his wife, Ginnie. 'Every spring I was glad when we were done.'"

"The American Chemistry Council has more than trippled its political spending ahead of the midterm elections as it fights tougher chemical regulations in Washington, according a new report from a watchdog group."

"Four new substances have been added to a list of chemicals that may cause cancer compiled by the U.S. Department of Health and Human Services (HHS)."

"Gov. Jerry Brown's veto of a bill to reform the California Department of Toxic Substances Control is drawing indignation from community groups and state legislators who had pressed for broad changes at the troubled agency."

"Starting [Wednesday], Baker Hughes Inc., a major provider of hydraulic fracturing services, says it will disclose all the chemicals it uses in fracking fluid and will no longer withhold ingredients as trade secrets."