BBC: About 1% of all the tree species in the Amazon account for half of the carbon locked in the vast South American rainforest, a study has estimated. Although the region is home to an estimated 16,000 tree species, researchers found that just 182 species dominated the carbon storage process. Amazonia is vital to the Earth's carbon cycle, storing more of the element than any other terrestrial ecosystem. The findings appear in the journal Nature Communications. "Considering that the Amazon is massively...