Big polluters must pay for their role in creating the climate crisis, campaigners said Wednesday as the United Nations hosted its 25th annual Conference of the Parties (COP 25) of the United Nations Framework Convention on Climate Change.

“For decades, big polluters have gone to any lengths to block, weaken, and delay policy,” Pascoe Sabido, researcher and campaigner for the Corporate Europe Observatory, said in a statement. “That time is over. They need to pay for the real solutions and be held liable for their years of abuse.”

The call to hold corporations accountable came in the wake of reports on the sponsorship of the conference by emissions-spewing corporations, including Spain’s largest polluter, the electric power generator Endesa.

As Earther reported, the sponsorship is a good deal for Endesa:

On Tuesday, Observatory of Multinationals in Latin America researcher Erika González wrote for Common Dreams that “sponsorship is a symptom of a larger problem of corporate capture at the UNFCCC.”