These self-described trolls tackle climate disinformation on social media with wit and memes

But climate advocates like Heglar have adopted a form of rebuttal better associated with the Internet’s ne’er-do-wells — trolling — infused with voice, verve and mordant humor. Greentrolling gives them reach and immediacy, a leveler against well-funded corporate marketing machines, and is increasingly being employed by youth activists, researchers, lawmakers and others to push against the greenwashing they say is rife on social media.