Now, scientists are rallying people against the Times and its new hire.

Climate scientist Michael E. Mann launched the hashtag #ShowYourCancellation this week after the paper’s public editor defended the decision to hire the former Wall Street Journal columnist, dismissing its so-called “left-leaning critics” who they claimed were leading a “fiery revolt.”

Mann called for people to prove to the Times that they were actually ending their subscriptions to the paper over Stephens, who published his first column on being skeptical about the effects of climate change on Friday.

The @NYTimes hiring of climate denier didn't lead me to cancel subscription. Public editor's offensive response did: https://t.co/BRnmwKIBmX pic.twitter.com/En14mZVYoD — Michael E. Mann (@MichaelEMann) April 25, 2017

@trafficstatic @ClaraJeffery @nytimes Calling critics of climate denialism "left-leaning" e.g. is offensive to me as scientist. Treats scientific reality as political football. — Michael E. Mann (@MichaelEMann) April 25, 2017

The Times’ decision to hire Stephens, a Pulitzer Prize-winning columnist, was part of the paper’s efforts to expand its range of political views. But for many, Stephens’ hire was a backward step for a paper that had previously declared climate change to be one of the most pressing modern topics.

And Mann wasn’t the only scientist to denounce the paper’s decision. Ken Caldeira, a Stanford climate researcher, and physics professor Stefan Rahmstorf, an ocean science fellow with the American Geophysical Union, both wrote letters to Times editors alerting them of their canceled subscriptions.

“I will support your newspaper no more,” Rahmstorf wrote to the Times in his letter, which he shared on Twitter Thursday. “Instead, I will give the money to ClimateFeedback.org, a worldwide network of scientists sorting fact from fiction in climate change media coverage. It is much better invested there.”

Thanks to Mann, many others are following suit.

@millcitywriter @MichaelEMann @nytimes #showyourcancellation Was on the fence for a while - still so many good things there - but Stephens and the condescending defense tore it. pic.twitter.com/srL8M5plxR — Ian W. Hill (@geminicollision) April 26, 2017

Important to cancel.@nytimes sided with climate deniers and labeled climate science left-leaning. #ShowYourCancellation, "cancel ny times" https://t.co/OUseD5zAHP — Susan Hatch (@SusaMorgan) April 29, 2017

.@NYtimes ad boasts "Truth. It has NO alternative." So why did they hire a climate denier? #ShowYourCancellation - My @nytimes subscription. pic.twitter.com/mqxRsLsBwc — Franke James (@frankejames) April 26, 2017