Grants of between £5,000 and £50,000 are now available for groups to apply for, allowing them to deliver air quality-improving trees, plants and green play areas in each neighbourhood.

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The mayor of London wants to protect London’s green belt and is attempting to make the capital the world’s first National Park City.

“We need more greenery across all of our communities and I want everyone – young and old – to be able to get involved in helping make local areas greener,” said Mr Khan.

“That’s why I’m announcing £1m in green grants for local groups to help create the community gardens, play areas and allotments needed to improve our air and enrich our daily lives.”

Mr Khan wants to make more than 50% of London green by 2050.

Last month, the mayor launched his draft London Environment Strategy which set out his plans for the National Park City which he aims to launch in Spring 2019.

Mr Khan will publish a natural capital account for London later this year which will highlight the economic value of London’s green infrastructure.