That's according to a UNICEF report.
A report suggests one billion children are living in one of the 33 countries considered 'extremely high-risk' from climate change.
That's nearly half of the world's population of youngsters.
Unicef also found that two billion are exposed to high levels of air pollution - with the UK currently ranking 17th for CO2 emissions.
Teen activist Greta Thunberg says it's a 'lie' to suggest Britain's a world leader in tackling the problem
Nkosi from Zimbabwe, Mitzi from the Philippines, Tahsin from Bangladesh and @GretaThunberg from Sweden are calling for urgent climate action.
— UNICEF (@UNICEF) August 20, 2021
In their words, what the world is doing is not enough. The climate crisis is a child rights crisis. pic.twitter.com/l32wRocVZM
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