Katharine Hayhoe on why we need to talk about climate change

Sun sets over sea ice in the Victoria Strait along the Northwest Passage
Researchers look out from the Finnish icebreaker MSV Nordica as the sun sets over sea ice in the Victoria Strait along the Northwest Passage in the Canadian Arctic Archipelago in July 2017. Studies show the Arctic is heating up twice as fast as the rest of the planet. Scientists are concerned because impacts of a warming Arctic may be felt elsewhere.