The way we buy food is damaging to the environment. We tend to buy food from mega farms that use petroleum based fertilizers, and the food then need to be ships hundreds or thousands of miles, burning more fuel and further polluting the environment. This also applies to just about any manufactured good. The further you have to ship it, the worse it is for the environment.
There for I suggest using taxes to influence production locations. If you are a democrat, add a 0.5% tax for every hundred miles a product traveled from it point of origin to it's destination. If you are a republican, instead offer a tax break for the closer something was produced.
People and businesses are bargain hunters and will usually opt for locally grown/made foods and products if they are cheaper. This will also force businesses to decentralize the build regional manufacturing. This will provide more jobs for more areas, and as towns will likely get several smaller factories, it will help buffer communities from the impact of a large business going out of business or moving it's manufacturing (like has happens with automovite "company town").