Today the UK government announced that the sale of new petrol and diesel cars will be banned from 2040
Just five years ago there were just 70 electric or plug-in hybrid vehicles on Welsh roads, but in 2016 there were more than 1,700 of them.
Today's plan to deal with roadside emissions from dirty diesels is just the start of the government's wider ambition to clean up UK air.
Watch Owain Phillips' report:
Air pollution is linked to around 40,000 premature deaths a year in the UK, and transport also makes up a significant share of greenhouse gas emissions.
In Cardiff, two major road (A48M and A4232) have been found as being ‘localised hot spots’ for air pollution.
The Welsh Government say Wales are leading the way when it comes to developing clean technologies.