PowerPoint with Audio: What is the composition and nature of soil, commonly called dirt? Part 2 of 4 soil presentations in the Living on Planet Earth Series. This program describes the composition and function of soil. It also encourages that we properly dispose of hazardous materials, recycle and compost so that soil can produce nurturing food, dependable clothing fiber and building materials.
"We know that, on average, each tree absorbs from 13 to 48 pounds of carbon dioxide per year. We have planted 15 trees. How much carbon dioxide absorption will the trees we’ve already planted enable in the next 50 years?" Five math problems with an environmental theme.