This is a map that shows light pollution around the UK.
It’s a map of light pollution that shows which cities are the worst light pollution hotspots.
This map was made using the UK Environment Agency’s National Light Pollution Map which is available for free download.
It shows the total amount of light that is emitted into the atmosphere each year in the UK as well as the number of hours each day that the total amounts of light are reduced by the amount of sunlight hitting the Earth’s surface.
Source: Google News