8.4 Million Metric Tons By Indy Staff Thu Aug 03, 2006 | 12:00pm Share this: Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Click to email a link to a friend (Opens in new window) Email Click to print (Opens in new window) Print Add independent.com on Google Add the SB Independent as your preferred source to see more of our stories on Google. Amount of carbon emissions we would avoid each year if only 10% of homes in the U.S. used solar water-heating systems.