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1) Tell the Fundies to back birth control. They're against it, and their bought-and-paid-for leader Bush has cut sensible family-planning aid both in the US and elsewhere. Result: Spiraling and unsustainable birth rates.
2) If you live in a rural or even exurban part of the US, take up deer hunting. The deer population in the US has grown waaaaay beyond sustainability, to the point where the deer are scouring the forest floor so that everything below the tree branches in deer-heavy areas is a denuded moonscape: http://www.citypages.com/detail.asp?ArticleID=12655
3) Grow at least some of your own herbs and veggies. Even a condo balcony can support a cold frame. If you've got more space, or even some dirt by a sunny wall of your house, try tomatoes or peppers. (If nothing else, you can grow chiles; they don't take much space to grow and are packed with vitamins and other good things.) Every little bit helps.