How should customers make final choices?

It is often said that buying food grown at local farms is a better choice than buying from a supermarket or grocery store.
But is this true? Many farmers forgo the use of chemical pesticides and fertilizers. Many say that, for this reason, locally grown food is healthier and fresher than the produce you get from your local supermarket, and that it tastes better too. Buying vegetables at a farmer’s market, they say, is also better for the environment if you compare it with buying the same vegetables from the local grocery store; these have very likely been packed and shipped months before. It’s a simple idea—the shorter the trip from the farm to our plate, the fresher and healthier our food will be.