No more new petrol or diesel cars after 2035

New cars and vans that use diesel and petrol as fuel will be banned in the UK from 2035.

The government had originally said the ban would happen in 2040 - but they've brought it forward by five years.

It's all part of a push to help Britain achieve nearly zero carbon emissions by 2050 and to help improve air pollution.

The prime minister made the announcement before an event to launch COP26 - that's a group set up the the United Nations which looks at how to tackle climate change, and will meet in Glasgow at the end of 2020.

He said hybrid vehicles - that's a vehicle that uses both electric and petrol or diesel - will also be banned.

This means that in 15 years' time motorists in the UK will only be allowed to buy electric cars.

Some people have said that's not a great idea, because there aren't enough electric cars being produced to go around at the moment.

But Boris Johnson said 2020 would be a "defining year of climate action" for the planet.

A spokesperson for Friends of the Earth, an environmental charity, said the plans are a good idea but that the ban should come in even sooner.