Global Warming!

I use Compact Fluorescent light bulbs everywhere I can. I bike to work, even in the rain. I drive a Toyota Prius and get 45-50 miles per gallon. I don't run the dishwasher or washing machine until I have a full load. I keep my thermostat low in the winter had high in the summer, minimizing heating and cooling costs. This is all pretty basic stuff, no rocket science or anything. I keep hoping for a solar cell breakthrough that will make it practical to economically run my home on solar power. I would happily spend $5000 today on a home solar power system if it meant I'd never pay another dime to the electric company. It is certain that humans are responsible for global CO2 being higher than it's ever been as far back as we can measure. I believe scientists' predictions that the higher CO2 will cause more heat to be retained in the atmosphere and that this will raise global air and water temperatures and cause changes to our climate. Yes, there are natural heating and cooling cycles, but CO2 has never been higher than about 300 parts per million (ppm) any time in the last 650,000 years until modern industrial times. We're now around 380 ppm and that level is rising. I don't believe any part of the planet will be rendered uninhabitable in just a couple of years, but perhaps in as little as 20 and likely within 50 years we'll see significant global changes that could include the loss of currently habitable areas to rising sea levels or desertification.