I envision large tracts of land that were once covered in GMO corn and soy and sprayed with Monsanto's Roundup now being covered in food forests... with sustainable homes nestled in their shade.
We can have reforestation, and we can feed ourselves at the same time. Edible reforestation. No need to plow and replant annuals every year. Basing our agriculture on tree crops will not only save fossil fuels that are used for tilling, sowing, harvesting, etc., but we will be allowing the soil to heal and now capture water again, preventing erosion and allowing clean water to come back to the impoverished landscapes.
I'm sorry, but when I see "amber waves of grain," I see a former forest. Or a native prairie filled with thousands of different wildflowers. These massive fields are the biggest waste of land and resources. We could be growing foods with far less energy and much more nutrition.
Many remark that if society can't fully embrace these examples, then doing it themselves wouldn't make much sense anyhow. But the No. 1 thing to do, the most selfish thing a person and family could do, is to plant as many edible trees around their home as possible. Bring back the Garden of Eden and cut your grocery bills at the same time. Plant a living grocery store in your yard.