"Open train cars filled with sand have raised alarm in St. Paul's St. Anthony Park neighborhood, where some residents wonder if the silica that comprises 80 percent of the unprocessed sand is safe."

"Twenty trade groups representing the plastics, vinyl and chemical industries are lobbying to stop the General Services Administration from adopting proposed new standards for green building construction, saying the changes could eliminate the use of hundreds of their products in construction projects."

"Tropical Storm Debby weakened as it drifted ashore on Florida's Gulf Coast on Tuesday, dumping more rain on flooded areas and sending thousands of people fleeing from rising rivers."

"Perhaps you heard the story going around today. A genetically modified grass started pumping out cyanide gas, killing a herd of cattle. CBS News had the scoop, as seen at WTVR.com in Richmond: 'Genetically modified grass linked to cattle deaths.' It’s basically a story custom-built for rapid spread around the internet. And it is basically completely wrong. The grass at issue, Tifton 85, was not genetically modified at all, but rather is a hybrid."

"Thousands flee homes as western wildfires persist. Colorado's Governor Gary Herbert estimates the fire has caused millions of dollars worth of damage. Soot and smoke also worry residents."

"The Obama administration, moving swiftly on the president’s promise to expedite the southernmost portion of the disputed Keystone XL pipeline, has granted construction permits for part of the route passing through Texas, officials said on Tuesday."

"WASHINGTON — A federal appeals court on Tuesday upheld a finding by the Environmental Protection Agency that heat-trapping gases from industry and vehicles endanger public health, dealing a decisive blow to companies and states that had sued to block agency rules."

"OTTAWA -- Changes to Canada's environmental protection laws in the federal budget implementation bill will offer new tools to 'authorize' water pollution, while allowing the government to outsource services to protect the country's waterways, says Fisheries and Oceans Minister Keith Ashfield."

"GRANTS PASS, Ore. -- The timber industry is hoping that the U.S. Supreme Court will maintain business as usual on controlling muddy water running off logging roads into salmon streams."