James E. Hansen Retiring From NASA to Fight Global Warming - NYTimes.com
James E. Hansen, the climate scientist who issued the clearest warning of the 20th century about the dangers of global warming, will retire from NASA this week, giving himself more freedom to pursue political and legal efforts to limit greenhouse gases.
At the same time, retirement will allow Dr. Hansen to press his cause in court. He plans to take a more active role in lawsuits challenging the federal and state governments over their failure to limit emissions, for instance, as well as in fighting the development in Canada of a particularly dirty form of oil extracted from tar sands.
“As a government employee, you can’t testify against the government,” he said in an interview.
...Even some of his allies consider him prone to rhetorical excess and to occasional scientific error.
He has repeatedly called for trying the most vociferous climate-change deniers for “crimes against humanity.” And in recent years, he stated that excessive carbon dioxide emissions might eventually lead to a runaway greenhouse effect that would boil the oceans and render earth uninhabitable, much like Venus.
Dr. Hansen says he senses the beginnings of a mass movement on climate change, led by young people.