"Residents and elected officials are speaking out against a proposed border barrier through Texas’ biggest state park and one of the jewels of the national park system."

"Increased activity by the fin whale - the world's second-largest whale species - along Chile's northern coast during feeding season is highlighting a growing threat of collisions with ships and fishing net entanglements, marine experts and conservationists warned this week."

"The Trump administration this week threatened to pull the United States out of the world’s leading energy agency unless it abandoned its focus on tackling climate change."

"Chemicals increasingly used to replace the toxic plastic additive bisphenol A (BPA) may disrupt fertility, fetal development, and reproductive health through many of the same biological mechanisms, according to a narrative review of human, animal and laboratory studies."

"President Trump issued an executive order late Wednesday aimed at spurring the domestic production of glyphosate, a widely used weedkiller that has figured in health lawsuits."

"America’s farmers and farmworkers, their families and neighbors, are being diagnosed with cancer at rates higher than the national average. A growing body of research indicates that pesticides are partly to blame."

"Two lawsuits filed Wednesday in the D.C. Circuit Court of Appeals mark the beginning of a rocky legal road for the Environmental Protection Agency following its reversal of a 2009 rule underpinning federal regulation of greenhouse gas emissions."

"The Environmental Protection Agency plans this week to loosen restrictions on coal-burning power plants, allowing them to emit more hazardous pollutants including mercury, a powerful neurotoxin that can impair babies’ brain development, internal agency documents show."

"Watching the Winter Olympics is an adrenaline rush as athletes fly down snow-covered ski slopes, luge tracks and over the ice at breakneck speeds and with grace."

"The culprit depends on where you live — but it’s probably not data centers (yet)."