The natural environment category is one of eight categories driving the overall Best States rankings, and encompasses metrics reflecting pollution threats and air and water quality. Learn more ...

The air and water quality subcategory informs the best states for natural environment rankings and the overall Best States rankings. It comprises two measures: the number of days with an air ...

20. Slovenia — As well as being a thorn in the UK's side when it comes to Brexit, Slovenia is one of Europe's most prosperous nations, helped along by the best natural environment of any nation ...