"A prominent land rights activist has been shot dead by five gunmen at a hospital in Brazil where he was recovering from a previous assassination attempt."

"Secretary of Defense James Mattis has asserted that climate change is real, and a threat to American interests abroad and the Pentagon’s assets everywhere, a position that appears at odds with the views of the president who appointed him and many in the administration in which he serves."

"More than $4 billion is needed by the end of March to help nearly 20 million people who risk starvation in Nigeria, Somalia, South Sudan and Yemen, United Nations Secretary General Antonio Guterres said on Wednesday."

"Qayyarah, Iraq - Six months after ISIL fighters torched oil wells in Qayyarah, Iraqi fire crews are still battling the flames. Like a scene from a Hollywood blockbuster, a vast and pervasive darkness hangs over Qayyarah, as toxic black smoke billows from the burning wells.

Oil has been a key source of income for the Islamic State of Iraq and the Levant (ISIL, also known as ISIS) group, making Qayyarah an important strategic town. Its recapture last August by Iraqi forces was a significant gain in their advance towards Mosul.

The National Response Center, run by the Coast Guard, takes reports of toxic spills and is supposed to keep a database on spill incidents. But a new study shows that it does nothing of the sort -- putting the public at risk by keeping them in the dark.

"U.S. Navy-trained dolphins and their handlers will participate in a last-ditch effort to catch, enclose and protect the last few dozen of Mexico's critically endangered vaquita porpoises to save them from extinction."

"The Mosul Dam is failing. A breach would cause a colossal wave that could kill as many as a million and a half people."

"Rebel groups reportedly dumped diesel into the source of the city's water supply, prompting authorities to shut down pipelines. Government forces are laying siege to the source of the water."

"In a former Montana National Guard armory where more than 20 workers got sick, lead-laced dust bunnies the size of tangerines clogged the ventilation system. ... Hundreds of armories across the United States have been contaminated by dangerous amounts of lead dust, an 18-month investigation by The Oregonian/OregonLive has found."