I seriously wonder about the credentials of this psychologist. There are forms of CBT like ACT and other approaches like Prolonged Exposure or EMDR or group therapy that specialize in dealing with anxieties about things that are real, massive, ongoing, and out of someone's control. Things like chronic illnesses in oneself or loved ones, abuse that someone isn't able to escape for financial or social reasons, homelessness, discrimination and bullying, or even just mortality itself.

Climate change is not the first and it won't be the last. Treating it like it is realer than other phobias and special enough to need its own field seems like it's feeding and taking advantage of an actually irrational phobic response.

Honestly, this looks like a grift to sell her book. Maybe a self-delusional one, but a grift nontheless.