In Bolivia, urban growth poses a major pollution threat to Lake Titicaca, South America's largest freshwater lake. Some downstream communities are trying to fight back.
A new kind of toilet may be the salvation of Lake Titicaca. It's sanitary and it may even produce compost suitable for growing food.
With urban populations increasing, Lake Titicaca is being polluted with waste from booming cities in Peru and Bolivia.
South America's most famous lake is being polluted by increasing levels of waste from fast-growing cities, according to locals, environmentalists and politicians.
Gold-mining operations in remote regions of the Peruvian Amazon have stirred major environmental and health concerns over mercury contamination in fish, fish-eating wildlife and humans.
Marcelino Coila Choque, a local fisherman, is concerned that over-fishing and water contamination will threaten the future of Lake Titicaca's resources.
Illegal gold mining has become rampant in Peru. The government has tried to curb the practice by raiding mining operations, but so far this has had little impact.
Millions of children from around the world celebrated Global Handwashing Day, an effort to raise awareness about importance of good hygiene.
Clinical trials for US-bound drugs are increasingly conducted in Central and South America because it's cheaper and faster. But does this efficiency compromise safety for trial participants?
Small-scale gold miners have poured into the Madre de Dios region of Peru. The local governor has declared a state of emergency and vowed to take all means necessary to stop illegal mining in the area.
Peru's rainforests have been a hot spot for resource extraction even before rubber baron Carlos Fitzcarald first arrived in the Madre de Dios region.
As many as 20,000 people are involved in illegal gold mining in the Madre de Dios region of Peru, which has resulted in the destruction of soil and forests as well as the release of toxic mercury.