EPA chief Scott Pruitt denies CO2 is a 'primary contributor' to global warming

Scott Pruitt, head of the Environmental Protection Agency, said Thursday he "would not agree" that carbon dioxide has been proven a "primary contributor" to global warming. Despite a statement from NASA and the National Oceanic and Atmospheric Administration in January noting the planet's rising temperature has been "driven largely by increased carbon dioxide and other human-made emissions into the atmosphere," Pruitt insisted "we don't know that yet" and need "to continue the debate." The EPA's website also cites carbon dioxide as the "primary greenhouse gas that is contributing to recent climate change."
"I think that measuring with precision human activity on the climate is something very challenging to do and there's tremendous disagreement about the degree of impact," Pruitt told CNBC's Squawk Box.
Watch Pruitt's denial below. Becca Stanek
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.

Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
Sign up for Today's Best Articles in your inbox
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
-
Book reviews: 'The Thinking Machine: Jensen Huang, Nvidia, and the World’s Most Coveted Microchip' and 'Who Is Government? The Untold Story of Public Service'
Feature The tech titan behind Nvidia's success and the secret stories of government workers
By The Week US
-
Mario Vargas Llosa: The novelist who lectured Latin America
Feature The Peruvian novelist wove tales of political corruption and moral compromise
By The Week US
-
How to see the Lyrid meteor shower
The explainer A nice time to look to the skies
By Devika Rao, The Week US
-
DHS chief Kristi Noem's purse stolen from eatery
Speed Read Homeland Security Secretary Kristi Noem's purse was stolen while she dined with family at a restaurant in Washington, D.C.
By Peter Weber, The Week US
-
Trump stands by Hegseth amid ouster reports
Speed Read The president dismissed reports that he was on the verge of firing Defense Secretary Pete Hegseth over a second national security breach
By Rafi Schwartz, The Week US
-
Hegseth reportedly shared war plans in 2nd group text
Speed Read The defense secretary sent information about an attack in Yemen to a Signal group chat that included his wife and brother
By Peter Weber, The Week US
-
Judge threatens Trump team with criminal contempt
Speed Read James Boasberg attempts to hold the White House accountable for disregarding court orders over El Salvador deportation flights
By Rafi Schwartz, The Week US
-
Biden slams Trump's Social Security cuts
Speed Read In his first major public address since leaving office, Biden criticized the Trump administration's 'damage' and 'destruction'
By Peter Weber, The Week US
-
El Salvador refuses to return US deportee
Speed Read President Nayib Bukele of El Salvador said he would not send back the unlawfully deported Kilmar Ábrego García
By Peter Weber, The Week US
-
Trump says electronics tariff break won't last
Speed Read The tariff exemptions on smartphones, laptops and other electronic devices are temporary, the administration says
By Peter Weber, The Week US
-
Man charged in arson attack on Pennsylvania's Shapiro
Speed Read Governor Josh Shapiro and his family were sleeping when someone set fire to his Harrisburg mansion
By Peter Weber, The Week US