Reducing your paper mail can reduce mental clutter as well as physical waste -- by reducing what is coming in, you can reduce what is going into the recycling bin too. How does it make you feel? What is the next step you will take to reduce your waste?
I believe that the most prominent, global contribution to affecting the planet has to be plastics. Microplastics end up in stomachs, oceans and communities worldwide.
Pollution and chemicals consumed over time have a side effect of mental health. A community that is environmentally inept will not have connections made between neighbors because they won't wanna go outside.