There are two premises that I think cover every aspect of helping the environment.

When the United Stated initiated the Environmental Protection Agency in the early 1970s, they used a catchphrase and symbol of the three R's - reduce, reuse and recycle.
Around the same time, the United States Forest Service introduced Woodsy Owl and the motto "Give a hoot—don't pollute!"

I have tried to live my adult life with those two ideals in mind.