The clearest way to know where our food comes from is to raise some of it ourselves. Caring for food-producing animals can teach us loads of valuable lessons and gives us the hands-on choice about how the animals we eat or that produce food for us are treated. It's not practical for most of us to have a farm in the backyard, but maybe you could create a nice little space for a chicken or two in that unused corner of your yard? If not, find someone who is doing this that you can support or collaborate with.