Make a donation to your local land trust. (http://findalandtrust.org)
These organizations are helping to make sure that open space exists to provide clean air and water, land for farming and forestry, and places to recreate. The best part is you can see exactly how your money is used by looking at the properties they’re protecting right there in your community.
For even more assurance that the land trust you’re donating to is well run, look for an accredited land trust near you. (http://www.landtrustaccreditation.org/land-trust-locator)