A year and a half ago, I started riding this for my daily commute, and any other time I need to get between point A and point B
Granted, I can do so only during reasonable weather, but if it is 28 degrees or higher, and dry, I ride. The bike cruises at 55-60 mph and gets 100 mpg. I've put over 7000 miles on mine, but then again for awhile I had a fifty two mile round trip commute, and still have a thirty four mile round trip commute. This is a Bajaj Chetak scooter, from India. But you can find your local dealer here<
http://www.bajajusa.com>. There are others out there also, but in my experience these are the best scooters on the road. These bikes are perfect for the city, or in reality anywhere.
I also grow a great deal of my own food, and if I don't grow it, I get my food from as many local sources as possible. This too saves energy and you also benefit from higher quality food. And it doesn't neccessarily have to cost more. I work out an exchange with my neighbor who raises organic cattle, and in return for buying bulk(I purchase a quarter beef at a time), I have a significant price break. It works out to be $1.83/lb for any cut of beef. I also obtain chicken and pork the same way. Granted I live on a twenty acre farm, but frankly almost everybody can have a garden of some size, preserve the food, and/or patronize their local farmers and farmers market.
I'm fortunate enough to live on a piece of land large enough to put up a wind turbine, which I'm doing this summer. It takes up aprox a quarter of an acre, and in most urban settings you will have to deal with local codes which may prohibit turbines(though I do know a fellow who put his own up in the St. Louis area in the late seventies, and has upgraded with no problems). However those who have houses can install solar panels on them, generally enough to supply their own energy needs. But even if you're an apartment dweller, you can still put pressure on your local governement and energy providers to force them into purchasing energy from renewable suppliers. My nearest city, Columbia Mo, recently voted to require the city get five percent(increasing this percentage gradually over time) from renewable sources. The city jumped in with both feet and is now purchasing ten percent of their energy from renewables, and is aggressively pushing it upwards.
When my pickup truck finally dies(for I believe it makes the best economic/energy sense to fully use something up before getting something to replace it), I will be purchasing a diesel vehicle and running it on biodiesel that I make. I'm already doing this for my diesel tractor. It is a simple, easy way of using renewable fuel that is clean burning and clean to produce(the waste products from making biodiesel are water and glycerin, which I sell to a local neighbor who makes soap). You can get a kit to make your own biodiesel, and between picking up the used fryer oil and the actual manufacture, I spend about three hours of time per forty gallon batch, which costs aprox. sixty cents per gallon for costs. You too can set one of these up in your garage and make your own<
http://www.homebiodieselkits.com/>
There are things that you can do, from simple to complex, from inexpensive to large initial cash outlays that will more than pay for themselves in time. Inform yourself, do some research, see what your budget and circumstances allow, and then go out and do it. It is really that simple.