Stop mowing your lawn, or persuade someone to stop mowing theirs, then plant with fruit trees/bushes (lawns are poor ecosystems, lawnmowing creates continous pollution and energy use) An idea from douglas macrae smith

of course you dont have to get rid of all the lawn, just a part of it, every little bit helps

Can't support this enough! Raising food and cultivating ecosystems rather than energy- and sweat-intensive grass is better for you, the world, and all the creatures living on it.
Movements that focus on these ideas include the permaculture and Slow Foods movements. Some books I would recommend include Paradise Lot and Gaia's Garden, Second Edition. They are fun, easy to read, and can result in a lot of fresh fruit for you (with little to no work!)