Reuters: Certain rocks abundant on the U.S. East and West coasts may one day be coaxed to absorb emissions of the main greenhouse gas carbon dioxide at a rate that could slow climate change, scientists say. “One day this could be an incredibly useful tool to help fight global warming,” said Sam Krevor, the lead author of a new study by scientists at Columbia University’s Earth Institute and the U.S. Geological Survey that maps such rocks in the United States. Scientists have long known …