SCIENCE: Physicist offers $30K prize for proof refuting man-made climate change Published: Wednesday, July 2, 2014 A scientist has staked $30,000 of his own money to anyone who can prove that man-made climate change does not exist. Please subscribe to ClimateWire to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.