How Much Matter Died to Fill Your Tank? <A HREF="http://abcnews.go.com/sections/SciTech/DyeHard/dyehard-1.html" target="_new">http://abcnews.go.com/sections/SciTech/DyeHard/dyehard-1.html</A> About 98 tons of dead plants and animals per gallon...