The four largest environmental groups in the country supported the president Joe BidenHis re-election despite opposition from climate activists to his administration’s support for fossil fuel plans, including the approval of an oil project in Alaska and a pipeline in West Virginia.

The League of Conservation Voters, the Sierra Club, the Natural Resources Defense Council and NextGen America issued an unprecedented joint endorsement of Biden and Vice President Kamala Harris Wednesday night during the league’s annual dinner in Washington, DC.

The groups’ speakers applauded the White House’s climate change agenda, including the passage of the Inflation Reduction Act and its $375 billion in clean energy and electric vehicles, the largest climate bill in U.S. history. The law aims to reduce greenhouse gas emissions by up to 1 billion tons by 2030.

But some smaller climate groups are withdrawing their support, condemning the president for breaking his campaign promise to end all oil and gas drilling on federal lands. The Biden administration has since ordered the sale of offshore drilling leases, hastened completion Mountain Valley Pipeline as part of the debt relief bill and approved the controversial Alaska Drilling Project Willow called.

Advocacy groups have said that while they will continue to hold the administration accountable for fossil fuel projects, having Biden serve a second term is critical to advancing other climate initiatives.

Members of the group emphasized that the White House has done more to address the climate crisis and environmental injustice than any administration in US history, and warned that the alternative could be a Republican who would approve more fossil fuel plans and jeopardize the country’s climate progress.

“President Biden acted courageously during a critical tipping point in the fight against climate change,” said Ben Jealous, National Executive Director of the Sierra Club. “No other administration has done more to move us forward. The stakes could not be higher and the choice could not be clearer.”

While enacting an aggressive climate agenda, Biden also took steps to increase fossil fuel production to appease Sen. Joe Manchin, DW.Va. and Republicans who say the climate agenda threatens US energy security.

During the dinner, Biden touted his climate record, adding that while there are many threats facing “our children, grandchildren and great-grandchildren,” climate change “is the only truly existential threat.”

“If we don’t meet the requirements that we’re looking at, we have a real problem,” the president warned the audience. “Together we have made great progress so far, but we have work to finish.”

Biden has promised to cut the country’s emissions in half by 2030 and reach net zero emissions by 2050. Its federal agencies have proposed tighter limits pollution from carstrucks and power plantswhich are the country’s most ambitious climate regulations to date that would substantially reduce emissions.

Soon in office, Biden rejoined the Paris climate agreement, a landmark non-binding agreement among nations to reduce carbon emissions, and created the first-ever National Climate Action Task Force to implement a “whole of government” approach to climate change mitigation. His administration has also pledged to provide at least 40% of the benefits of federal climate and clean energy investments to disadvantaged communities.

“President Biden’s leadership on climate has been nothing short of historic,” Manish Bapna, president and CEO of the NRDC Action Fund, said in a statement. “His policies are already driving a manufacturing renaissance in the heart with clean energy at its core, and he’s worked to advance environmental justice.”

Former president Donald Trumpfrontrunner in the 2024 Republican primary field, has pulled the U.S. out of the Paris climate accord and weakened a number of environmental regulations designed to reduce emissions and protect the nation’s air, soil and water.

Together, the four endorsement groups represent millions of members and activists in every state across the country, with campaigns that have invested millions of dollars in previous elections.