"Hospitals are on red alert and parts of Buenos Aires have been evacuated as a toxic cloud descends upon the city."

"A species of giant tortoises from the Galapagos Islands could be brought back from extinction despite the death earlier this year of the famed 'Lonesome George,' a tourist magnet and conservation icon who was the last of his kind."

"For a clue to the possible impact of climate change on modern society, a study suggests a look back at the end of classic Maya civilization, which disintegrated into famine, war and collapse as a long-term wet weather pattern shifted to drought."

"BRASILIA, Brazil, October 18, 2012 (ENS) – President Dilma Rousseff has vetoed nine items of the Forestry Code approved by Congress in September. One of the vetoes cancels amnesty for those who cleared the rainforest illegally."

"Hundreds of Peruvian farm workers, the majority of them women, became sick after inhaling a pesticide sprayed on a nearby field, the state-run Andina news agency reported."

"A Brazilian judge said on Monday construction could resume on the controversial $13 billion Belo Monte dam in the Amazon, alleviating concerns that key work would not be done ahead of the rainy season."

"Clashes in northern Peru between police and demonstrators opposing a multi-million dollar gold mining project have left at least three people dead."