Some people believe that going the organic/free range route for their food is healthy for the environment. It is not.
The use of growth hormones reduces the amount of time that the animal is required to be fed. Since green house gases are one of the major concerns with going green, the less time that the animal is alive before going to market, the less green house gas it will produce.
Now, people may have other reasons for going organic and that is fine, but going green is not a valid reason.