David MacKay, a physics professor at the Univeristy Cambridge, wrote an insightful commentary on CNN news, Let's get real about alternative energy. The article gives a realistic view of the feasibility of alternative energy and how that would impact our lives. In the article, MacKay breaks down the amount of energy simple household products use (One kilowatt-hour (kWh) per 40-watt bulb on for 24 hours), how much the average persons uses in a year (the average European uses 125 kWh per day per person; the average American uses 250 kWh per day for transport, heating, manufacturing, and electricity). MacKay uses this information to put into perspective how much alternative forms of energy really produce. For those of you interested in learning more about "green" energy this is a great article. Ultimately, in current economy the best thing you can do to save energy is to buy an electric car (Hydrogen cars use around 254 kWh per 100 km, the average fossil car in Europe uses 80 kWh per 100 km; the electric vehicles use as little as 20 kWh per 100 km, or even 6 kWh per 100 km)!