The world - renowned physicist Stephen Hawking has said that the future of humanity faces existential challenges and suggested «some form of world government». (totalpolitics.com)
Despite having set itself up as a million miles from the mainstream parties, it now faces the same, crucial existential challenges in the wake of Brexit. (theconversation.com)
The introduction to the report is stark: «Pollution is one of the great existential challenges of the Anthropocene epoch. . . (priceofoil.org)