While referencing other major challenges facing the world — including disease, economic inequality and the threat of terrorism — President Barack Obama declared climate change to be the “one issue that will define the contours of this century more dramatically than any other” at a United Nations summit Tuesday afternoon.
Climate change, Obama said, is an “urgent and growing threat,” and it “is changing faster than our efforts to address it.”
“The alarm bells keep ringing. Our citizens keep marching,” he said. “We cannot pretend we don’t hear them. We have to answer the call.”