![Earth Day Network](https://socialjusticeresourcecenter.org/wp-content/uploads/2016/08/Earth-Day-Network.png)
Measures how much biologically productive land and sea is used by a given population or activity, and compares this to how much land and sea is available. Read more.
Measures how much biologically productive land and sea is used by a given population or activity, and compares this to how much land and sea is available. Read more.