population growth Stephen Hawking Says Earth Will Become ‘Sizzling Ball of Fire’ in 600 Years 08 November 2017
Stephen Hawking: 'We Are Close to Tipping Point Where Global Warming Becomes Irreversible' 03 July 2017
Stephen Hawking + 374 Top Scientists: Trump's Climate Denial Would Have 'Severe and Long-Lasting' Consequences 21 September 2016
Stephen Hawking to Larry King: ‘We Certainly Have Not Become Less Greedy or Less Stupid’ 28 June 2016
