From Storms to Droughts, Devastating Extreme Weather Linked to Human-Caused Climate Change
2011 has already become the deadliest year for tornado outbreaks in the United States since 1953, with more than 500 people killed. Extreme weather has made headlines across the world, as well, with megafloods occurring in Colombia, Vietnam, Pakistan and Australia, even as the Amazon just faced its second hundred-year drought in the past five years. News audiences are seeing the warning "severe weather" increasingly flash across TV screens, but little connection has been made to the role humans have played in driving climate change. We speak with environmentalist Bill McKibben, founder of the grassroots climate campaign, 350.org. "We’re making the earth a more dynamic and violent place," McKibben says. "That’s, in essence, what global warming is about."