Khabibullo Abdusamatov Quote

Mars has global warming, but without a greenhouse and without the participation of Martians. These parallel global warmings — observed simultaneously on Mars and on Earth — can only be a straightline consequence of the effect of the one same factor: a long-time change in solar irradiance.

as quoted by Lawrence Solomon in Look to Mars for the truth on global warming, National Post, January 26, 2007.