"'The catalytic converter has had a profound impact on our environment,' says Jim Kliesch, senior engineer for the Union of Concerned Scientists. Advances in the catalytic converter, which rolled out on GM's 1975 model-year cars, and computer-controlled fuel injection technology have all but eliminated tailpipe emissions, he says."
Podcast: Debate on 'Global Warming Is Not a Crisis'
'Global Warming Is Not a Crisis' (listen)
Intelligence Squared & National Public Radio
March 22, 2007
In Favor of the Motion: Michael Crichton, Richard S. Lindzen, Philip Stott
Against the Motion: Brenda Ekwurzel, Gavin Schmidt, Richard C.J. Somerville
"That was the question at the core of a recent Oxford-style debate called Intelligence Squared U.S. The series is based on the Intelligence Squared program that began in London in 2002. Three experts argue in favor of a motion; three others argue against it.
In this debate, the proposition was: "Global Warming Is Not a Crisis." In a vote before the debate, about 30 percent of the audience agreed with the motion, while 57 percent were against and 13 percent undecided. The debate seemed to affect a number of people: Afterward, about 46 percent agreed with the motion, roughly 42 percent were opposed and about 12 percent were undecided."
More details here.
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