Pretty soon, for a young scientist to study climate change will be about as unattractive and dangerous as it is for a young medical student to go into late-term abortion surgery.

I mean, as soon as a graduate student figures out that a) climate change is real and b) he/she will be pilloried and persecuted for doing any work that says this (YouCut, anyone?), he/she will have to make a decision: courageous principle, or go into pharmaceutical chemistry, make more money, and lead a quiet life.