Climate activist Greta Thunberg lashed out at U.S. special climate envoy John Kerry over his latest suggestion about combatting global warming.
Kerry simply suggested that technological advancements will play a key role in lessening carbon emissions in an interview with BBC that aired on Sunday.
"I am told by scientists, not by anybody in politics but by scientists, that 50% of the reductions we have to make to get to net zero by 2050 or 2045, as soon as we can, 50% of those reductions are going to come from technologies that we don't yet have," Kerry said.
"That's just a reality," he added. "And people who are realistic about this understand that's part of the challenge."
Kerry, 77, was arguing that Americans won't necessarily need to drastically change their lifestyle in order to curb emissions because of expected advancements by tech companies.
Thunberg took to Twitter to ridicule Kerry and characterize his argument as one of pure fantasy.
"Great news! I spoke to Harry Potter and he said he will team up with Gandalf, Sherlock Holmes & The Avengers and get started right away!" she mocked.
She also retweeted a response to Kerry from climate scientist Michael Mann.
"This is one trial balloon that needs to be popped," he tweeted with a link to Kerry's comments.
Mann went on to accuse Kerry of participating in "pernicious technophilia" that had "infected" public discourse and blamed Microsoft co-founder Bill Gates for popularizing the idea that technological advances offered hope to lessen carbon emissions.
Despite his misgivings, Mann praised the Biden administration for their global warming policies in his own interview with BBC News.
"IEA analysis shows that about half the reductions to get to net zero emissions in 2050 will need to come from technologies that are not yet ready for market," said IEA chief Fatih Birol in April.
Here's more about Biden's carbon emissions promises:
Biden seeks to reduce US carbon emissions in half by 2030 www.youtube.com