"Senior U.S. health officials have squelched a Food and Drug Administration proposal that for the first time would have curbed dentists’ use of mercury – one of the planet’s nastiest toxins because it attacks the central nervous system – in treating Americans’ decayed teeth."

"House Republicans have unveiled a package of bills aimed at bringing the country’s energy infrastructure, reliability and other energy matters into the modern era."

"A six-year highway bill crafted by Senate Majority Leader Mitch McConnell (R-Ky.) and Sen. Barbara Boxer (D-Calif.) was in limbo Tuesday after lawmakers rejected a motion to move forward with the measure in a 41-56 vote."

"The wind energy industry won a key victory Tuesday in the Senate Finance Committee that extended an important tax credit for renewables."

"Microscopic bugs and mildew can destroy a marijuana operation faster than any police raid. And because the crop has been illegal for so long, neither growers nor scientists have any reliable research to help fight the infestations."

"Federal regulators have begun a push for new cybersecurity defenses to prevent sophisticated attackers from penetrating utility control rooms and other industrial control system centers by infiltrating malware on third-party vendors' products."

"When Hillary Clinton kick-started her second presidential campaign on June 13 at New York's Roosevelt Island, environmentalists were all ears—and so were environmental reporters."

"BUFFALO — Along a bend in the Buffalo River here, an enormous steel and concrete structure is rising, soon to house one of the country’s largest solar panel factories. Just to the south, in the rotting guts of the old Bethlehem Steel plant in Lackawanna, where a dozen wind turbines already harness the energy blowing off Lake Erie, workers are preparing to install a big new solar array."

"Intense drought conditions have shrunk the kernels and disrupted the proteins of winter wheat crops in Montana, Washington, Oregon and Idaho, the region that produces a fifth of the U.S. harvest."

"Louisiana is in trouble. The Mississippi River Delta is disappearing into the Gulf of Mexico at the rate of 16 square miles a year, some of the fastest land loss on the planet."