Here in Japan the price of gas has been over $5 per gallon for years. I simply walk, ride a bike, or use public transportation. Not only do I save money, but I stay healthy too.
When I lived in America I had three vehicles, a car, a jeep, and a motorcycle. But even with three vehicles I rode my bicycle when the weather allowed. My daily commute was 20 miles each way, each day. After several months of cycling to and from work, I had lost several pounds and had a resting pulse of 48 beats per minute.
My family owns a large parcel of land in west Texas, and I have nearly finished building an energy self-sufficient home. I built thick, extra-insulated walls, double pane glass, and situated the house so as to let the sun shine through the windows in the winter, but not in the summer. The house is fully solar powered, but I was able to buy the equipment cheaply by salvaging solar panels from wrecked highway signs. The only large expense was the battery storage system, but the cost of the batteries is recouped after only 8 months of being off the grid. The batteries last about 8 years, so you can imagine the amount of money saved.
As for global warming, it's nonsense. Climate has changed more drastically over shorter periods of time in the past than it is now, and even Dr. Phil Jones, head of EAU's climate change unit had to admit to the BBC that there has been no statistical global warming since 1995, and that the hot years in 2003 and 2010 were due to El Nino influences. "Climategate" was much more publicized in Europe than in America. And interesting note is that while the ice caps were shrinking (and then re-expanding) on earth, they were doing the same thing on Mars... Those probes we sent to Mars must have generated some serious C02.