Climate change activist Greta Thunberg responded Monday to singer Meat Loaf's claims that she's been "brainwashed," tweeting that her activism is "all about scientific facts."

The youth climate strike leader tweeted Monday afternoon that the debate about reducing carbon emissions around the world was "not about Meatloaf," adding that "unless we start to focus everything on this, our targets will soon be out of reach."

It’s not about Meatloaf.

It’s not about me.

It’s not about what some people call me.

It’s not about left or right.



It’s all about scientific facts.

And that we’re not aware of the situation.

Unless we start to focus everything on this, our targets will soon be out of reach. https://t.co/UwyoSnLiK2 — Greta Thunberg (@GretaThunberg) January 6, 2020

Meat Loaf, who appeared on President Trump Donald John TrumpBarr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' Military leaders asked about using heat ray on protesters outside White House: report Powell warns failure to reach COVID-19 deal could 'scar and damage' economy MORE's "Celebrity Apprentice" reality show, recently criticized the teenage activist over her vocal support for reducing carbon emissions and frequent criticism of world leaders including Trump.

"She has been brainwashed into thinking that there is climate change and there isn't," he said. "She hasn't done anything wrong but she's been forced into thinking that what she is saying is true."

The U.S. government, United Nations and most global scientific bodies recognize that Earth's climate is changing due in large part to man-made carbon emissions, an issue that has caused the U.N.'s leading climate research body to declare that ambitious reductions of carbon emissions are required to stop the worst effects.