Global Warming: Have they no grandchildren?

New York Op-Ed columnist Thomas Friedman wrote another piece on global warming. In it he quotes contrarian hedge fund manager Jeremy Grantham writing in his July letter to investors:

“Conspiracy theorists claim  to believe that global warming is a carefully constructed hoax driven  by scientists desperate for ... what? Being needled by nonscientific  newspaper reports, by blogs and by right-wing politicians and think  tanks? I have a much simpler but plausible ‘conspiracy theory’: the  fossil energy companies, driven by the need to protect hundreds of  billions of dollars of profits, encourage obfuscation of the  inconvenient scientific results. I, for one, admire them for their P.R.  skills, while wondering, as always:

‘Have they no grandchildren?’ ”