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How the AP-NORC poll on climate change was conducted

FILE - In this June 3, 2017, file photo, the coal-fired Plant Scherer, one of the nation's top carbon dioxide emitters, stands in the distance in Juliette, Ga. A new poll finds that less than a third of Americans support President Donald Trump’s decision to withdraw from the Paris climate accord, with just 18 percent of respondents agreeing with his claim that pulling out of the international agreement to reduce carbon emissions will help the U.S. economy.(AP Photo/Branden Camp, File)
FILE - In this June 3, 2017, file photo, the coal-fired Plant Scherer, one of the nation's top carbon dioxide emitters, stands in the distance in Juliette, Ga. A new poll finds that less than a third of Americans support President Donald Trump’s decision to withdraw from the Paris climate accord, with just 18 percent of respondents agreeing with his claim that pulling out of the international agreement to reduce carbon emissions will help the U.S. economy.(AP Photo/Branden Camp, File) FILE - In this June 3, 2017, file photo, the coal-fired Plant Scherer, one of the nation's top carbon dioxide emitters, stands in the distance in Juliette, Ga. A new poll finds that less than a third of Americans support President Donald Trump’s decision to withdraw from the Paris climate accord, with just 18 percent of respondents agreeing with his claim that pulling out of the international agreement to reduce carbon emissions will help the U.S. economy.(AP Photo/Branden Camp, File)

The Associated Press-NORC Center for Public Affairs Research poll on climate change and the Paris climate accord was conducted by NORC on June 8-11. It is based on online and telephone interviews of 1,068 adults who are members of NORC’s nationally representative AmeriSpeak panel.

The original sample was drawn from respondents selected randomly from NORC’s National Frame based on address-based sampling and recruited by mail, email, telephone and face-to-face interviews.

NORC interviews participants over the phone if they don’t have internet access. With a probability basis and coverage of people who can’t access the internet, surveys using AmeriSpeak are nationally representative.

Interviews were conducted in English and Spanish.

As is done routinely in surveys, results were weighted, or adjusted, to ensure that responses accurately reflect the population’s makeup by factors such as age, sex, race, education, region and phone use.