Climatology

This May 3, 2009, photo taken in Point Hope, Alaska, provided by the Alaska Native Tribal Health Consortium, shows the entrance to an ice cellar, a type of underground food dug into the permafrost to provide natural refrigeration used for generations in far-north communities. Naturally cooled underground ice cellars, used in Alaska Native communities for generations, are becoming increasingly unreliable as a warming climate and other factors touch multiple facets of life in the far north. (Mike Brubaker/Alaska Native Tribal Health Consortium via AP)

FILE - In this Nov. 30, 2017 photo, boats are shown moored in the Anclote River near the old Stauffer chemical plant site in Tarpon Springs, Fla. Hundreds of the nation's most polluted places are at an increasing risk of spreading contamination beyond their borders by more frequent storms and rising seas. Sixty percent of U.S. Superfund sites are in danger from weather extremes like hurricanes or wildfires, and the Trump administration’s reluctance to acknowledge and plan for climate change is hurting chances of safeguarding them, according to a government watchdog. (AP Photo/Chris O'Meara, File)

Climate activist Greta Thunberg speaks after a climate change march in Los Angeles, on Friday, Nov. 1, 2019. Thunberg says young people are rallying to fight climate change because their age leaves them with the most to lose from damage to the planet. (AP Photo/Ringo H.W. Chiu)

FILE - In this Sept. 4, 2019, file photo, people hold hands and navigate their way through a flooded street as it rains in Mumbai, India. The number of people threatened by climate change-triggered flooding is about three times higher than previously thought, a new study says. But it's not because of more water. It's because the land, especially in Asia and the developing world, is several feet lower than what space-based radar has calculated, according to a study in the journal Nature Communications Tuesday, Oct. 29. (AP Photo/Rajanish Kakade, File)

FILE - In this Jan. 5, 2016, file photo, Chris Lene sweeps water out of one of the businesses in the building he owns that was flooded by rainwater in Sacramento, Calif. Climate change is making stronger El Ninos, which change weather worldwide and heat up an already warming planet, according a study in Proceedings of the National Academy of Sciences on Monday, Oct. 21, 2019. (AP Photo/Rich Pedroncelli, File)

A sign, part of a public design installation by artist Thomas Starr, is displayed on a gazebo outside the University of New Hampshire boathouse in Durham, N.H., Wednesday, Oct. 16, 2019. Starr, a graphic and information design professor from Boston's Northeastern University, created the project to address possible effects of climate change. (AP Photo/Charles Krupa)

Super scoopers make drops on the Saddleridge fire in Placerita Canyon near Newhall, Calif., Friday, Oct. 11, 2019. (David Crane/The Orange County Register via AP)

Pope Francis celebrates an opening Mass for the Amazon synod, in St. Peter's Basilica, at the Vatican, Sunday, Oct. 6, 2019. Pope Francis is opening a divisive meeting on preserving the Amazon and ministering to its indigenous peoples, as he fends off attacks from conservatives who are opposed to his ecological agenda.(AP Photo/Andrew Medichini)

Canadian Prime Minister Justin Trudeau speaks Swedish environmental activist Greta Thunberg in Montreal on Friday, Sept. 27, 2019. Thunberg says she delivered the same message to Trudeau that she gives to all politicians -- that he needs to listen to the science and act on it. (Ryan Remiorz/The Canadian Press via AP)

FILE - In this Sept. 13, 2014, file photo, California Gov. Jerry Brown, front right, and China's National Development and Reform Commission Vice Chairman Xie Zhenhua, front left, sign an agreement to boost bilateral cooperation on climate change during a news conference at the Bay Area Council, in San Francisco. As tensions between China and the United States ratchet up, former California Gov. Jerry Brown sees a way to bring together the world's largest carbon emitter and a U.S. state that's leading the way in energy standards: climate change. (AP Photo/Beck Diefenbach,file)