Antonino Zichichi is an Italian physicist who specializes in the area of nuclear physics. He was president of the Istituto Nazionale di Fisica Nucleare from 1977 up to 1982 and is currently an emeritus professor of physics at the University of Bologna. 
Claude Allègre, 75 years old, is a French geochemist and politician. He is a former minister of the French Socialist Party,  and does academic work at the Institut de Physique du Globe de Paris (IPGP) — Institute of Geophysics, Paris.
Democracy is utterly dependent upon an electorate that is accurately informed. In promoting climate change denial (and often denying their responsibility for doing so) industry has done more than endanger the environment. It has undermined democracy.
There is a vast difference between putting forth a point of view, honestly held, and intentionally sowing the seeds of confusion. Free speech does not include the right to deceive. Deception is not a point of view. And the right to disagree does not include a right to intentionally subvert the public awareness.