"How the country challenged the junk-food industry and became a global leader in the battle against obesity."

"The fate of a mysterious hummingbird — and that of the indigenous population that shares its territory — hangs by a thread."

"A new pollution problem has surfaced in Guanabara Bay, the venue for sailing in the Rio de Janeiro Olympics."

"SANTIAGO - A ban on harvesting shellfish in Chiloé due to a severe red tide outbreak sparked a social uprising that has partially isolated thousands of local residents of the southern Chilean archipelago and revived criticism of an export model that condemns small-scale fishing communities to poverty and marginalisation."

"Federal prosecutors in Brazil filed a 155 billion-real ($43.5 billion) civil lawsuit on Tuesday against iron miner Samarco and its owners, Vale SA and BHP Billiton, for a collapsed tailings dam in November that killed 19 people and polluted a major river."

"After sampling muddy water from the mouth of the Amazon River, oceanographer Patricia Yager steamed in the research ship Atlantis toward the continental shelf, where a Brazilian colleague was chasing a phantom. Yager’s colleague was carrying a 1977 six-page research paper that included a hand-drawn map suggesting this region might mask an extraordinary set of reefs."

"Four men have been found guilty in Costa Rica for the killing of a sea turtle conservationist in 2013. The chief of a three-judge panel said the slaying of Jairo Mora Sandoval, who worked for a green group called Widecast, was tied to his activism in a war 'between poachers and environmentalists on the beach.'"

"Long before gunmen burst into Berta Cáceres Flores’s house in rural Honduras, Beverly Bell gave up any hope that her friend would live to an old age. “This was a marked woman,” said Bell, who kept a long list of the death threats. “Everyone knew it.”"

"A deadly algal bloom has hit the world's second biggest salmon exporter, Chile, where nearly 23 million fish have already died and the economic impact from lost production is seen soaring to $800 million, industry and government sources told Reuters."

"An indigenous community in the Peruvian Amazon took at least eight public officials hostage to demand help from the central government after an oil spill polluted its lands, authorities said Monday."