That represents a little more than 1/2 day of household CO2 production!
(98/150 = 0.65 days of household CO2 production)
1 Day = 150 lbs of CO2 per U.S. household – excerpt from the March 2009 issue of National Geographic Magazine titled Saving Energy – It Starts at Home. The images above are from the article. You can also get them at National Geographic Wallpapers.