The difference that a bit of exposure to green forage in an outdoor environment makes, both to the flavour and texture of the chicken, is AMAZING. Industrial broiler barn chicken pales in comparison.
I'd encourage anyone seeking to buy a more environmentally friendly chicken to try to make contact with a local organic farmer who's able to raise his birds outside and in a humane fashion.
We also raise our birds to be much heavier than a store bought bird - on average about six pounds after processing vs three-ish pounds in the store. I'd wager that your meat-to-carcase ratio is probably higher for one of our birds, giving a better value. (Actually, it's better value regardless - we sell our birds for $4/lb vs $5/lb for the broiler barn organic birds in the store.)
Environmentally, there's less concentration of pollutants. All of the chicken manure goes straight on the grass and is a primo source of nutrients for subsequent hay crops. For me it's a win - I don't have to apply fertilizer nor clean out chicken barns.
Coming from an animal welfare standpoint, just because you're buying "organic" chicken in the store, doesn't mean they've been raised in a humane fashion. I carry no guilt in eating our chickens. They're not overcrowded, debeaked or in a dusty, foul smelling environment. They live as well as I can provide up until the day they go for slaughter.
(I don't know anything about your consumption, just making a point.)
Assuming we all share the goal of a famine free world, with its people living lives of relative equality, then the excessive consumption of meat in the west is a problem which needs to be addressed.
As the parent suggests, treat high quality meat like the luxury it is, and enjoy other foods instead. It's better for you, and better for your fellow humans.
I see a future where lab grown meat, and meat substitutes make up the majority of our consumption, and hand-reared, high quality meat is saved for special occasions.