With fewer than 400 individuals surviving in the wild, the Sumatran tiger continues to find refuge in Indonesia's Bukit Barisan Selatan National Park, a World Heritage Site on the southern tip of Sumatra Island. But the critically endangered feline's habitat is rapidly shrinking. Illegal squatters have already converted nearly 20 percent of the 900,000-acre (356,000-hectare) park to farmland for the cultivation of coffee, pepper and other crops. And a large post-tsunami influx of immigrant settlers from the provinces of Aceh and North Sumatra has only increased pressures on the resource-rich protected area.

Despite government efforts to evict as many as 15,600 families who have built semipermanent homes within the park, the influx continues, endangering not only the

Ninety Tea Farms Become Rainforest Alliance Certified

One of the largest remaining fragments of South America's Atlantic Forest is home to endangered species such as the golden lion tamarin monkey and the Brazilian rosewood tree, but it is also home to thousands of acres of tea farms. Although we often associate the production of tea with China and other Asian countries, the tea plant (Camellia sinensis) is grown commercially in many places around the world, usually where rainfall is heavy and accompanied by warm days and cool nights -- such as in the highlands of northeastern Argentina. Even though tea farming didn't begin there in earnest until the 1950s, Argentina currently exports around 110 million pounds (50 million kilograms) of tea per year, mostly to the