A reader asks the Green Guide:

How much of my carbon footprint and my company's carbon footprint can I reduce by working at home, instead of going into the office? My company is starting a green program and wants suggestions. This is mine, and I'd like some statistics to share.

The Green Guide responds:

Who doesn't want a greener office? You spend so much time and effort in reducing your own carbon footprint that it's only logical to turn your attentions to the next place you spend so much of your life.

The biggest impact working from home can have is on transportation. The average commute to work in the U.S. is 12 miles, and each gallon of gas burned emits 25.3 pounds of carbon dioxide (CO2). For an efficient car, which might average 25 miles per gallon, this would add up to 25 pounds for a round-trip commute. For a guzzler, you could be spewing 50 pounds per day.