SANTA CRUZ PROVINCE, ARGENTINA - NOVEMBER 27:  Ice calves at the Perito Moreno glacier in Los Glaciares National Park, part of the Southern Patagonian Ice Field, the third largest ice field in the world, on November 27, 2015 in Santa Cruz Province, Argentina. The majority of the almost 50 large glaciers in Los Glacieres National Park have been retreating during the past fifty years due to warming temperatures, according to the European Space Agency (ESA). The United States Geological Survey (USGS) reports that over 68 percent of the world's freshwater supplies are locked in ice caps and glaciers. The United Nations climate change conference begins November 30 in Paris.  (Photo by Mario Tama/Getty Images)
Mario Tama/Getty Images South America/Getty Images
SANTA CRUZ PROVINCE, ARGENTINA - NOVEMBER 27: Ice calves at the Perito Moreno glacier in Los Glaciares National Park, part of the Southern Patagonian Ice Field, the third largest ice field in the world, on November 27, 2015 in Santa Cruz Province, Argentina. The majority of the almost 50 large glaciers in Los Glacieres National Park have been retreating during the past fifty years due to warming temperatures, according to the European Space Agency (ESA). The United States Geological Survey (USGS) reports that over 68 percent of the world's freshwater supplies are locked in ice caps and glaciers. The United Nations climate change conference begins November 30 in Paris. (Photo by Mario Tama/Getty Images)
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(CNN) —  

CNN will host a Democratic presidential town hall in September focused on the climate crisis.

The event will take place on Wednesday, September 4, in New York City. CNN is inviting candidates who meet the Democratic National Committee’s polling threshold for the September primary debate to participate, meaning they’ve reached at least 2% in four approved polls by August 28.

Eight candidates so far have met the polling threshold: former Vice President Joe Biden, New Jersey Sen. Cory Booker, South Bend, Indiana, Mayor Pete Buttigieg, California Sen. Kamala Harris, Minnesota Sen. Amy Klobuchar, former Rep. Beto O’Rourke, Vermont Sen. Bernie Sanders and Massachusetts Sen. Elizabeth Warren.

The 2020 Democratic field has been united in promising to combat climate change, with many candidates unveiling policy proposals to address the threat posed by a warming planet. President Donald Trump has pledged to leave the Paris climate accord and has said he does not believe government reports that cast grave warnings about the effects of climate change.

The most prominent proposal put forth by Democrats and backed by multiple presidential candidates has been the Green New Deal, the renewable-energy infrastructure investment plan proposed by Rep. Alexandria Ocasio-Cortez of New York.

The climate town hall will follow a similar format to ones CNN held earlier this year in Austin, Texas, Manchester, New Hampshire, and Washington, DC, in which Democratic candidates appeared back-to-back across the course of the evening.