Right on Buster!!!
Merurika:
TOGA TOGA TOGA!!

Actually togas are pretty comfy!
Good points Pat. Good points everyone!
Now I live on a perfect 5 acres set up for self sufficient living very well, I can't complain. The previous owners were very self sufficient and molded this property very well. The hard parts were already done for me.
However, I lived almost 10 years in the INNER-city from 99-08. I did what I could to lessen my footprint, save money and try to live as self sufficient as possible.
I walked EVERYWHERE; work, the farmer's market (we had 2 that I could get to on foot...and that was HOUSTON man!), the parks, the museums and even the zoo if I had on good shoes.
The two farmer's markets had almost everything I needed esp. since I was vegetarian back then. Because it was S. TX, veggies were available year round.
Inner city Houston also had community gardens all over. One was right by my house and it was over the size of a city lot. The gardeners all traded with each other and also held a little farmer's market of their own to pay for their rent. It was awesome!
My good friend that I worked with brought me eggs from her urban micro-farm. I gave her tons of herbs from my garden in exchange. Although I could have had a chicken or two in my backyard b/c there were no zoning laws.
My itty bitty yard was all 100% garden in the front (where it was sunny) and mulched in the back for the dogs (it was 100% shaded all the time), I havn't owned a lawn mower for years. I composted all my kitchen waste too.
I reused, recycled and made do with almost everything...though looking back I could have done even more.
All the cooking water and rinse water from hand washing my dishes went to that garden. I saved rain water too.
I cooked all the meals for us everyday...I wish I had known about "rocket stoves" back then.
I kept my lights off during the day.
I didn't use chemical cleaners.
I line dried our clothes. (It took seconds in the TX sun.) You could even line dry inside!!
I loved finding great used clothes at the many, many thrift stores around my neighborhood. I got most of what I needed there actually. Funny thing is there were hip clothing stores popping up everywhere that were all the rage b/c they sold "vintage" clothes...the mark up was unbelieveable!!
I wish I had the knowledge then that I have now. I could have done a heck of a lot more in many ways. Thank you SuffifientSelf!!!
I actually loved my city life. It was fast paced and exciting, loud and wild. I lived in an artsy neighborhood where the people were all different colors and very open minded. I loved that!! Halloween was always a BLAST!! You never knew what to expect.

But I digress...
The point being, no matter where you live you can do a lot more than you think to lessen your "footprint" and live as self sufficiently as possible with what you have. It may not be 100% self sufficient or 100% sustainable, but you can still make a big difference.
ETA: Yes I think I lived and am living a more ecological sustainable life.