"Toxic chemicals in the Great Lakes have dropped but invasive species and algal blooms threaten the lakes' ecosystems and keep them from being truly great, says a new report from the U.S. and Canadian governments."

"California’s largest lake is drying up. The Salton Sea has been shrinking for years, and fish and birds have been dying. The dry lakebed already spews toxic dust into the air, threatening a region with hundreds of thousands of people. And the crisis is about to get much worse."

"The overwhelming majority of bats are friends of humanity. They gobble up the insects that bite us and ruin our crops. They pollinate flowers and they replant forests by spreading seeds around. But as agriculture overtakes rain forests and jungles, humans have come into conflict with one bat species: the common vampire bat."

"Interior Secretary Ryan Zinke today announced a review of federal greater sage grouse conservation plans to determine in part if they are hindering energy production on public lands."

"The Food and Drug Administration (FDA) has resumed its first-ever endeavor to evaluate how much of a controversial chemical is making its way into the U.S. food supply. And the tests can’t come soon enough as safety concerns about the herbicide known as glyphosate grow."

"Neil Shook was relaxing at home in Woodworth, N.D., on a Saturday afternoon just over a week ago. 'My wife was outside and she yelled at me to come outside and take a look at this,' he recalls. A massive brown cloud covered the horizon to the west."

"An agreement reached last year between the U.S. and Canada may force state and federal officials to impose new limits on the amount of fertilizer that can be applied by farmers in parts of Ohio, Indiana, and Michigan. The two countries are seeking to halve the amount of nutrients, mostly from farms, that wash into Lake Erie. High levels of nutrients can cause algae blooms that contaminate the lake, an important drinking water source."

"Tireless in her quest, ethnobotanist Nancy Turner works with indigenous elders to preserve plant knowledge dating back to the First People in the New World."

"Maryland has become the second U.S. state to pass a law banning the routine use of antibiotics in healthy livestock and poultry, a move aimed at battling the rise of dangerous antibiotic-resistant bacteria known as 'superbugs.'"

"The House passed legislation on Wednesday to loosen federal regulations on pesticides in a 256-165 vote."