Republican leader: Climate change science ‘not known’

The role that human activity plays in climate change “is not known,” according to a Republican leader in the Senate.

Sen. John BarrassoJohn Anthony BarrassoThe law to protect endangered species in America is working Republican bill aims to deter NATO members from using Russian pipeline Overnight Energy: Fewer than half of school districts test for lead | Dems slam proposed changes to Endangered Species Act | FEMA avoids climate change when discussing plan for future storms MORE (Wyo.), who serves on the GOP leadership team, has lambasted the Obama administration’s efforts to curb carbon emissions.

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Asked if human activity contributes to climate change, Barrasso responded, “The climate is constantly changing. The role human activity plays is not known.”

In an interview taped for C-SPAN’s “Newsmakers” program, Barrasso said there is bipartisan opposition to the new regulations issued by the Environmental Protection Agency on climate change. He added the regulations will harm the economy and noted that a Democratic Congress couldn’t pass a cap-and-trade bill in 2009 and 2010.

Barrasso’s remarks come about a month after Sen. Marco RubioMarco Antonio RubioHillicon Valley: Trump's Russia moves demoralize his team | Congress drops effort to block ZTE deal | Rosenstein warns of foreign influence threat | AT&T;'s latest 5G plans On The Money: Trump 'ready' for tariffs on all 0B in Chinese goods | Trump digs in on Fed criticism | Lawmakers drop plans to challenge Trump ZTE deal Overnight Defense: White House 'not considering' Ukraine referendum | Pompeo hopeful on plans for Putin visit | Measure to block ZTE deal dropped from defense bill MORE (R-Fla.) attracted criticism for saying he doesn’t believe “human activity is causing these dramatic changes to our climate the way these scientists are portraying it.”

He later clarified those comments to say climate change is real while stressing he is against cap-and-trade solutions.

“Newsmakers” will air Sunday at 10 a.m. and 6 p.m. on C-SPAN.