If you teach science to American schoolchildren, there's a good chance that you might open your mailbox soon and find a package containing a free, unsolicited 135-page book and 11-minute DVD, plus a cover letter from the Heartland Institute, a Chicago-based free-market “think tank.”
“How do you teach global warming?” the letter begins. “I am writing to ask you to consider the possibility that the science in fact is not 'settled.' If that's the case, then students would be better served by letting them know a vibrant debate is taking place among scientists on how big the human impact on climate is and whether or not we should be worried about it.”
The climate “educational” supplies have already been mailed out to tens of thousands of science teachers — with 25,000 more planned every two weeks, the institute's CEO told PBS in March.
The mailings prompted a backlash from a group of federal lawmakers including Senators Sheldon Whitehouse, Elizabeth Warren, Edward Markey, and Brian Schatz, who warned that teachers should treat the free literature skeptically.