You have impact on the different environments across the world and they have impacts on each other.
In each color, there is a lighter circle that provides standard information about a location, while the other darker circles refer to the specific attribute. The size of the lighter circle makes reference to the environments original state, while the darker circles show the increase/decrease that has happened in the past 20 years.
You can hide and show environments by clicking on the legends. You can hover over the exact point to get specific details.