A U.S .House science subcommittee heard testimony today about the impact climate change is having on polar bears, permafrost, the Greenland ice sheet and other aspects of the Arctic. Dr. Richard Alley, an influential geosciences professor at Penn State, says scientists have a high degree of confidence that fossil fuel use by humans is changing the atmosphere and climate. He says the changes have been relatively small so far, but will be more drastic and costly in the future if nothing is done to curb greenhouse gas emissions.
Joel Southern, APRN – Washington, DC
