"We face a number of threats: nuclear war, global warming and genetically engineered viruses," one threat is climate change.
"Famed theoretical physicist Stephen Hawking warns a disaster on Earth is a "near certainty", owing to the growing risks posed by humanity's own scientific progress. -- Speaking in the lead-up to his eagerly expected public lecture on new research in relation to black holes, Hawking said the prospect of a planetary disaster is virtually inevitable, due to a number of ongoing threats for which we as a species are basically single-handedly responsible."
Stephen Hawking Says a Planetary Disaster on Earth Is a "Near Certainty"