Edelman, the world’s largest public relations company, was among the Charles Koch Foundation’s highest-paid vendors in 2022, a 990 tax disclosure form shows, alarming climate advocates.

The PR giant has made numerous climate declarations over the past decade, including making a pledge to eschew projects promoting climate denial. Partnering with a part of the Koch network, which has long worked to sow climate doubt, calls those pledges into question, said Duncan Meisel, the executive director of Clean Creatives, a non-profit pushing creative agencies to cut ties with fossil fuel polluters.