Piers Corbyn said it was “extremely worrying” that thousands of students in UK schools were being taught about climate change in a free programme backed by the United Nations.
The company EduCCate Global has already signed up more than 600 British teachers to complete an online course that gives them UN accreditation as a climate change teacher.
Mr Corbyn denies climate change is manmade and told talkRADIO’s Mike Graham “people who’ve been brainwashed want everybody else to be brainwashed”.
“It is extremely worrying that when an international organisation sets up a process to make direct propaganda using completely false claims, fraud and anti-science. There’s no scientific basis whatsoever for the theory of manmade climate change,” he said.
“What they’re putting forward is propaganda and lies in the interests of globalists – the globalist mega-corporations that make money out of all these handouts for stupid projects like this.”
The astrophysicist added: “We have to have a campaign to actually put scientific proof to people.”
Mr Corbyn also criticised 16-year-old climate campaigner Greta Thunberg as a “dropout” and said her fellow activists were prone to “virtue signalling”.
Meanwhile, Glasgow has been announced as the host of key UN climate change talks late next year.
The summit has been declared the most important round of UN talks since the global Paris Agreement was secured in 2015.
Foreign Secretary Dominic Raab said: “Over 30,000 delegates from around the world will come together to commit to ambitious action to tackle climate change.”
“We're ready to bring the world together to make sure we leave our precious environment in a better state for our children.”