From The New York Times:

OPINION: If You See Something, Say Something

Should we resist commenting on the implications of our scientific work? In the opinion of Michael Mann, the director of the Earth System Science Center at Pennsylvania State University, climate scientists can no longer stay on the sidelines of the global warming debate.

“It is not an uncommon view among scientists that we potentially compromise our objectivity if we choose to wade into policy matters or the societal implications of our work. ...