Want to do something about biodiversity but can’t afford to send a check to charity? Take up the local fight against invasives, plant some native plants, and watch the biodiversity grow before your eyes.

Now you know about the water crisis. Here’s what you can do!

TNC has preserves all over the U.S., and many of them need volunteer help throughout the year. If you’re looking for a way to travel in the U.S. and do a little good without going broke, check out this list.