They were against global warming before they were for it...

White House science czar John Holdren is a climate alarmist, even if he can't make up his mind whether the crisis is the Earth warming up or cooling down...

Or, as Gary Starr at American First Principles put it: "You could say he was against global warming before he was for it."

Global Warmer Hoaxer James Hansen Once Pushed Global Cooling

NASA bureaucrat James Hansen, if you'll remember, got rich helping Al Gore pull the wool over all the leftist climate groupies' eyes and his participation at NASA is tied to manipulation of data that resulted in false and misleading conclusions, and will likely get more attention as new revelations about data-hiding at NASA are expanded.

Opportunists all.