Trump's Defense Secretary Cites Climate Change as National Security Challenge
James Mattis’ unpublished testimony before a Senate panel recognizes a threat others in the administration reject or minimize
Stories by Andrew Revkin
Will Trump's Climate Team Accept Any "Social Cost of Carbon"?
The nation’s top science panel has just sketched a clearer way to set a fair price today for cutting tomorrow’s climate risks—and some of Trump’s advisers say the price should be zero
