Law Students for Climate Accountability on Wednesday launched its #DoneWithDunn campaign, sending a letter to the firm denouncing its representation of clients in the fossil fuel industry and demanding that it adopt standards governing what cases and clients it will forgo.

“We call on Gibson Dunn to commit to a publicly available ethical standard that articulates its protocol for representation of the fossil fuel industry,” the letter reads. “Diversity programs, pro bono, and in-office sustainability are all welcome but are insufficient as long as Gibson Dunn continues to perpetrate immense harm through its work for paying clients. There must be a line that Gibson Dunn will not cross.”