Swedish teen climate activist Greta Thunberg addressed hate and backlash to the youth-led movement she’s helped spearhead as she encouraged her followers to again strike for the climate crisis.

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In a series of tweets just two days after the Nobel Prize candidate gave a speech at the U.N. Climate summit, the 16-year-old said the “haters are as active as ever” — attacking her looks, clothes, behavior and differences.

“They come up with every thinkable lie and conspiracy theory. It seems they will cross every possible line to avert the focus, since they are so desperate not to talk about the climate and ecological crisis,” Thunberg tweeted.

“Being different is not an illness and the current, best available science is not opinions - it’s facts,” she added.

It seems they will cross every possible line to avert the focus, since they are so desperate not to talk about the climate and ecological crisis.

Being different is not an illness and the current, best available science is not opinions - it’s facts. -> — Greta Thunberg (@GretaThunberg) September 25, 2019

But don’t waste your time giving them any more attention.

The world is waking up. Change is coming wether they like it or not.

See you in the streets this Friday!#fridaysforfuture #schoolstrike4climate #climatestrike #aspiepower — Greta Thunberg (@GretaThunberg) September 25, 2019

Thunberg was criticized by some conservative commentators and even mocked by President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE, in the wake of her speech and climate strikes by activists worldwide.

“I honestly don’t understand why adults would choose to spend their time mocking and threatening teenagers and children for promoting science, when they could do something good instead. I guess they must simply feel so threatened by us,” Thunberg wrote in her Instagram caption. “But the world is waking up. See you in the streets this Friday!”

Michael Knowles, a conservative host of the Daily Wire podcast, called Thunberg a “mentally ill child,” on Fox News this week, prompting an apology from the network. Knowles said he wasn't attacking Thunberg, but rather "the left for exploiting a mentally ill child."

Thunberg has been open about being diagnosed with Asperger’s syndrome as well as ADHD, and has said her diagnosis has given her insight on her climate activism.

Fox News host Laura Ingraham Laura Anne IngrahamTrump assails Black Lives Matter in appeal to Black voters Ex-Pence aide: Trump spent 45 minutes of task force meeting 'going off on Tucker Carlson' instead of talking coronavirus Sean Hannity and Lou Dobbs to be deposed in Seth Rich lawsuit: report MORE on Monday night compared Thunberg and the youth climate activists to the murderous children in Stephen King’s “Children of the Corn” novel, saying they’ve been “brainwashed” by adults.

Trump appeared to mock Thunberg, tweeting “she seems like a very happy young girl looking forward to a bright and wonderful future,” in response to Thunberg’s speech at the climate summit hitting world leaders for stealing her future over their inaction on climate change.

Thunberg briefly updated her Twitter bio with Trump’s description.

Thunberg is continuing to call on students across the world to join the “Fridays for future” school strike. She started last year, protesting alone outside the Swedish parliament, which led to global demonstrations.