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President Joe Biden arrives at Denver International Airport on Tuesday, Sept. 14, 2021. President Biden was traveling to Colorado to visit the National Renewable Energy Laboratory and to stump for the passage of his bipartisan infrastructure bill.

From left: President Joe Biden is welcomed by Denver Mayor Michael Hancock and Colorado Gov. Jared Polis at Denver International Airport on Tuesday, Sept. 14, 2021.

A group of people gathered outside the National Renewable Energy Laboratory (NREL) in Arvada awaiting the arrival of President Joe Biden on Sept. 14, 2021. President Biden was in Colorado to visit the National Renewable Energy Laboratory and stump for the passage of his bipartisan infrastructure bill.

A group of people gathered outside the National Renewable Energy Laboratory (NREL) in Arvada awaiting the arrival of President Joe Biden on Sept. 14, 2021. President Biden was in Colorado to visit the National Renewable Energy Laboratory and deliver remarks calling for the passage of his bipartisan infrastructure bill.

From left: Julian Aguilar, general foreman at Dynalectric and member of International Brotherhood of Electrical Workers (IBEW) Local Union 68, Ben Fowke, Xcel Energy CEO, walk with Colorado Gov. Jared Polis, center, as he speaks with President Joe Biden on the grounds of National Renewable Energy Laboratory in Arvada on Sept. 14, 2021. Biden was in Colorado to visit NREL and to make that case that the investments in his bipartisan infrastructure bill and his Build Back Better agenda will help tackle the climate crisis, modernize America's infrastructure and strengthen the country's resilience. He also emphasized the role jobs union jobs would have in his vision.

President Joe Biden, right, speaks with Colorado Gov. Jared Polis before making remarks during a press conference on the grounds of National Renewable Energy Laboratory in Arvada on Sept. 14, 2021.

President Joe Biden delivers his remarks during a press conference on the grounds of National Renewable Energy Laboratory in Arvada on Sept. 14, 2021. Biden was on hand to stump for the passage of his infrastructure bill, in which climate change factored. The U.S. Senate passed the roughly $1 trillion bill last month 鈥� including $917 million for Colorado鈥檚 public transportation systems and $57 million to expand the state鈥檚 network of electric vehicle charging stations. The bill has not yet been voted on in the U.S. House.

President Joe Biden speaks during a press conference on the grounds of National Renewable Energy Laboratory in Arvada on Sept. 14, 2021. 鈥淐limate change is here today, not next year or 10 years from now. We have to make changes to slow climate change now, not in 10 years,鈥� he said.

President Joe Biden speaks during a press conference on the grounds of National Renewable Energy Laboratory in Arvada on Sept. 14, 2021. Biden was in Colorado to visit NREL and to make that case that the investments in his bipartisan infrastructure bill and his Build Back Better agenda will help tackle the climate crisis and modernize America's infrastructure.

Colorado Gov. Jared Polis addresses the audience during a press conference on the grounds of National Renewable Energy Laboratory in Arvada on Sept. 14, 2021. Polis toured the facility with President Joe Biden, who was visiting to make that case that the investments in his bipartisan infrastructure bill and his Build Back Better agenda will help tackle the climate crisis and modernize America's infrastructure.

Colorado Gov. Jared Polis, left, Julian Aguilar, general foreman at Dynalectric and member of International Brotherhood of Electrical Workers (IBEW) Local Union 68, center, applaud with President Joe Biden, right, during a press conference on the grounds of National Renewable Energy Laboratory (NREL) in Arvada on Sept. 14, 2021. Biden was in Colorado to visit NREL and to make that case that the investments in his bipartisan infrastructure bill and his Build Back Better agenda will help tackle the climate crisis, modernize America's infrastructure and strengthen the country's resilience. He also emphasized the role jobs union jobs would have in his vision.

President Joe Biden, left, heads to his limousine after taking a tour and holding a press conference at the National Renewable Energy Laboratory (NREL) in Arvada on Sept. 14, 2021. The president抖阴ap Colorado stop was the last leg of a two-day western tour, following appearances in Idaho and California on Monday. In those states, he discussed wildfire mitigation and campaigned with California Democratic Gov. Gavin Newsom, whose recall election was Tuesday.

President Joe Biden鈥檚 motorcade arrives at Denver International Airport after the president briefly visited the state on Tuesday, Sept. 14, 2021.

President Joe Biden prepares to board Air Force One before leaving Colorado on Tuesday, Sept. 14, 2021.

Air Force One carries President Joe Biden away from Colorado on Tuesday, Sept. 14, 2021.