There are a handful of places around the valleys where levels of pollution are so high that they could pose a risk to people’s health.
Addresspollution.org allows you to type in your postcode to check the level of air pollution and shows what the air is like on some parts of the postcode given. It also lets you know if the levels exceed the limits imposed by the World Health Organisation.
Read more: We asked Welsh scientists how worried they are about climate change
