Hey Mr. Green,
In your latest column about cars' failure to get better gas mileage, you didn't answer the mileage question directly. I have a 1986 Toyota Corolla that gets a consistent 39 to 41 miles per gallon on the highway. My friends with new Corollas rarely get...

Hey Mr. Green,
Is an electric car really more efficient than a hybrid getting 50-plus miles per gallon running on gas? How efficient (and green) can it be to charge an electric car with natural gas or coal-based electricity, when we lose roughly 66 percent of the original energy...

Hey Mr. Green,
If I scavenge firewood instead of buying it, is it better to heat my house by burning wood in my fireplace or by using electricity from traditional sources? -- Joyce in Charleston, South Carolina

Hey Joyce,
Perfect question for this time of year. If you...