The fossil-fuel industry is lawyering up.

To date, nine cities have sued the fossil industry for climate damages. California fisherman are going after oil companies for their role in warming the Pacific Ocean, a process that soaks the Dungeness crabs they harvest with a dangerous neurotoxin. Former acting New York state attorney general Barbara Underwood has opened an investigation into whether ExxonMobil has misled its shareholders about the risks it faces from climate change, a push current Attorney General Leticia James has said she is eager to keep up. Massachusetts attorney general Maura Healey opened an earlier investigation into whether Exxon defrauded the public by spreading disinformation about climate change, which various courts — including the Supreme Court — have refused to block despite the company’s pleas. And in Juliana vs. U.S., young people have filed suit against the government for violating their constitutional rights by pursuing policies that intensify global warming, hitting the dense ties between Big Oil and the state.

These are welcome attempts to hold the industry responsible for its role in warming our earth. It’s time, however, to take this series of legal proceedings to the next level: we should try fossil-fuel executives for crimes against humanity.