O'Rourke in California

O’Rourke called climate change “the mother of all challenges.”

Scientists “say there are still 10 years left to us, to free ourselves from a dependence on fossil fuels, to transition to renewable energy,… to do everything we can to set the example for the world and once again take our rightful role as the indispensable country, convening the other powers on this planet, together to do what otherwise is impossible, to keep us warming from another two or three degrees and ending life as we know it in some many parts of this country and of this world,” O’Rourke said.