"Even as thousands of residents of southern Louisiana are returning to their flood-damaged homes, more danger could lie ahead as rain continues to fall and the full extent of the damage can't be known, according to state emergency response officials."

"Scientists working with sophisticated DNA sequencing technology think they may have solved a 20-year-old mystery of what has caused thousands of Alaska’s wild birds to be afflicted with deformed, twisted beaks."

"Think of Mesa Verde National Park and you probably imagine iconic cliff dwellings sketched in sandstone. Those homes were built by the Ancestral Pueblo before they left the area in the late 13th Century. Climate change may be putting some of those dwellings in jeopardy."

"Top aides in the McCrory administration will have to testify under oath about a 2015 meeting on how to word do-not-drink warnings to well owners who live near Duke Energy coal ash ponds."

"Under fire from water agencies who were losing millions of dollars in lost water sales, Gov. Jerry Brown's administration two months ago dropped all mandatory water conservation targets and allowed cities, water districts and private water companies across the state to set their own targets."

"Climate change is never going to announce itself by name. But this is what we should expect it to look like. That’s what many scientists, analysts and activists are saying after heavy rains in southern Louisiana have killed at least 11 people and forced tens of thousands of residents from their homes, in the latest in a series of extreme floods that have occurred in the United States over the last two years."

"Mexico will launch a year-long simulation of a cap-and-trade program in November, Mexican officials said on Monday, in a test run for a national carbon market expected to launch in 2018."

"A leading U.S. coal regulator announced plans on Tuesday to toughen what it called "out-of-date" rules for guaranteeing mine cleanups."

"Ken Salazar and Jennifer Granholm will be helping to pick agency leaders and map out policy goals and could be in line for top administration jobs if Hillary Clinton clinches the White House."

"Hundreds of firefighters were battling a rapidly-spreading wildfire raging unchecked in drought-stricken Southern California on Wednesday after flames forced more than 80,000 residents to flee."