Voice of America: Unprecedented blizzards in the eastern United States have triggered renewed debate about climate change, with some critics using the record snow to attack the concept of global warming. Some experts have been quick to point out that the extreme weather is consistent with a pattern of climate change. Record-breaking snows in the U.S. capital have proponents and skeptics of climate change in a heated debate. Many critics of the theory of global warming say the recent blizzards in …