Exxon, Stephen Hawking, greens, and Reagan’s advisors agree on a carbon tax Posted on June 23, 2017 by Matthew T. Ballew https://www.theguardian.com/environment/climate-consensus-97-per-cent/2017/jun/23/exxon-stephen-hawking-greens-and-reagans-advisors-agree-on-a-carbon-tax Share this:EmailLinkedInTwitterFacebook