People litter. A LOT. I live in the rural Midwest and there's way too much garbage just alone the highway alone. It doesn't take long to grab some trash and throw it away. Take the family out to a local park and do some environmental clean up for the community.
Aligning your brand with environmentally friendly events can really boost your brand's image in the eyes of your audiences, as well as provide a reassurance that your business does more than just provide a product or service to people, but to the planet too.