They want to keep their jobs…..
Check them out:

There are government scientists and researchers who are skeptical of man-made global warming — they just won’t speak up about it, according to two seasoned climate scientists.

“There are skeptics in NASA and NOAA, a good number. But they are quiet. They know in this administration, they don’t speak out,” John Christy, a veteran climate scientist at the University of Alabama in Huntsville, told