Sad to say, you probably won't help the environment that much by shopping at Whole Foods.
Many contend that the real damage done to the earth by fruits and veggies is not how they are grown but how much fuel has to be burned to get them to you. After all, those organic strawberries didn't walk from Mexico.
Whole Foods offers only a limited supply of local produce. Even in summer months, no more than 30 percent of the produce in the average Whole Foods store is grown locally - but it is clearly labeled.
On one visit, just the veggies above were local. In early spring, only rhubarb was available.