While appearing on MSNBC’s “Mehdi Hasan Show” on Sunday, teenage climate change activist Greta Thunberg appeared to turn on President Joe Biden, saying that “the science” shows that his climate change actions are “not nearly enough” to actually combat global warming.

“In your view, how has Joe Biden done on climate issues in his first 50 days in office?” asked host Mehdi Hasan. “What grade would you give him?”

“Well, you shouldn’t take that from me, I’m just a teenager, so I don’t have the mandate to sort of give grades like that. My opinions on this doesn’t matter​,” Thunberg replied. “You should rather look at the science and whether his policies are in line with the Paris agreements and to stay below 1.5 or even 2 degrees Celsius, and then you can clearly see that, no, it’s not nearly enough in line with the science. That’s not me saying, that’s just black and white, looking at the facts​.”

Hasan pressed on, saying, “What would you like to see him do climate change that he isn’t doing, that he said he won’t do because his administration is saying, ‘we set up a climate office, we set up a climate czar, we resigned Paris, we’re conserving more land, undoing a lot of what Donald Trump did.’ What would you like to see him do that he’s not doing?

“I understand that it’s difficult and I would not want to be in a politician’s position right now,” she replied. “I can’t imagine how hard it must be. But, I would just like you to basically just treat the climate crisis like a crisis. They have said themselves that this is an existential threat. They better treat it accordingly, which they are not. They are just treating the climate crisis​ ​as it was a political topic, among other topics. Treat it as a crisis, that’s the Number one step​ we need to do.”

Thunberg famously went at it publicly with Donald Trump on climate multiple times during his presidency. Judging from her latest comments, it seems that Thunberg is not afraid of criticizing Democrat leaders as well.