Doesn't get much greener than this. And not only do you get pest control but fertilizer too! And the bonus eggs... Did I mention the entertainment? Free! The dude in the middle is "Romeo", a polish rooster. Although I have bigger roosters, he's the boss! Just look at him watching over his workers... Hee hee
Anyone can raise a chicken or three in their backyard. They don't need a huge amount of space. Just make sure your yard is fenced or your neighbour (and possibly his dog) will be enjoying a free Sunday dinner (if they're so inclined). And of course check the by-laws governing your property.