We do trail maintenance once a year at least. And I'm always picking up trash and moving limbs/branches off trails when we hike.
In general, we live pretty simply. I work from home and put only about 1500 miles on my car last year. My wife's new car gets 45 mpg. Every time we need to replace something in our house, we go to a more energy-efficient option, whether it's a light bulb or a refrigerator. We reuse and recycle, and try to buy only what we need; when we have multiple options, we choose the one with less packaging. It's embarrassing to "toot my own horn" like this! But what's cool is that almost all the things we do save us money, too.