Jacobson’s lawsuit is an appalling attack on free speech and scientific inquiry and we urge the courts to reject it as grossly unethical and without legal merit.

Further, we urge all environmentalists — including those that support the 100 percent renewables framework, such as Environmental Defense Fund, Sierra Club, and Natural Resources Defense Council (NRDC) — to join us in denouncing Jaconbson’s legal action.

What Jacobson has done is unprecedented. Scientific disagreements must be decided not in court but rather through the scientific process. We urge Stanford University, Stanford Alumni, and everyone who loves science and free speech to denounce this lawsuit.

The lawsuit rests on the claim that Clack et al. defamed Jacobson by calling his assumption that hydroelectricity could be significantly expanded a “modeling error.”

Environmental Progress weighed in on this controversy when Clack et al. published their article. In our view, it’s clear that Jacobson made a false assumption about the possibility of expanding U.S. hydroelectricity.

Jacobson’s assumption speaks to the essential fallacy of the 100 percent renewables proposal.

Renewables like solar and wind require vastly larger amounts of land and mining in order to produce power that is unreliable. Under the guise of protecting the environment, renewables destroy the environment.

One of the most environmentally devastating ways of producing electricity is with hydroelectric dams. While poor nations have a right to make cheap power from hydroelectricity, their environmental impact is enormous.

Jacobson’s proposal is to expand radically hydroelectric dams so they can support unreliable solar and wind energy. Such a proposal would devastate fish species even more than they have already been devastated.

The only way to promote such an environmentally devastating agenda is to claim it is good for the environment. That requires lying. Now that these lies have been exposed, it is revealing that Jacobson has resorted to a lawsuit that cannot and will not do anything more than intimidate his opponents.

Scientists and energy analysts should not be intimidated. We must stand up to bullies. We urge all lovers of nature and science to join us in denouncing this unprecedented and appalling attack on free inquiry.

I will add, finally, that this lawsuit saddens me personally. I debated Jacobson at UCLA and I believe he is a good person in the grip of a bad idea. I encourage him to drop the lawsuit.