National Public Radio: SCOTT SIMON, HOST: Draft report from the intergovernmental panel on climate change was leaked to the media this week. The scientists will report to the U.N. that it is nearly certain that human activity has caused most of the earth's climate change over the last 50 years. Now, this leak is certain to rekindle debates about how best to contend with events like increasing temperatures and rising sea levels, and it might make some people take a new look at what's called geoengineering. Jeff Goodell...