The Green Party's co-leader clashed with talkRADIO's Julia Hartley-Brewer over whether children should be able to take time off school to attend climate rallies.
During the fiery debate, Jonathan Bartley, accused the talk show host of spreading “crazy conspiracy theories” that climate change had been overblown by environmentalists.
But Julia insisted children were being taught to "be afraid".
“Being born today is the best time ever to be born other than being born tomorrow and yet our children are being told they should be anxious, that they should panic,” she said.
“This is doomsday cult scenario stuff. We shouldn’t be teaching our children to be afraid like this.”
The exchange comes as a day of climate protests are set to take place around the globe, with pupils taking time off school to attend.
Mr Bartley continued: "They are going to be around a hell of a lot longer than you are and they are the ones that are going to have to pay the consequences, now they are showing the leadership which you and other commentators should have shown over the last 10 years.
“This is an emergency, the science is undeniable and you can go on with your crazy conspiracy theories about how people are whipping up into a frenzy that’s unnecessary.”
In response, Ms Hartley-Brewer denied she was a conspiracy theorist and was not ignoring the science.
“I’m simply saying can we have a conversation about this based on some actual facts instead of fearmongering,” she said.
“You’re saying people are dying from extreme weather. Something like, I think the figure is in the region of a 90 per cent drop. More people on the planet and yet fewer people now die from extreme weather events than they ever did.”