James Hansen has been widely described as NASA's leading climate scientist; he's been studying the topic for more than three decades, and he began speaking publicly about the threat of global warming almost 20 years ago.
Just over a year ago, he went public with a charge that made headlines around the world: The Bush administration, Hansen said, had been trying to silence his warnings about the urgency of the need to address climate change.
Now, writer and scientist Mark Bowen has written a book on the affair. It's called Censoring Science: Inside the Political Attack on Dr. James Hansen and the Truth of Global Warming.
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