Composting can be a good way for gardeners to

reuse food scraps and yard trimmings

while making their gardens healthier.

In order to work properly, a compost

pile needs the right balance of air, moisture,

carbon, and nitrogen. Build several different

compost piles and vary the amounts of air, moisture, carbon,

and nitrogen in each (e.g., one that is very dry, one carbon-rich, and

one nitrogen-rich). For example, a carbon-rich pile would mostly contain

dead leaves or coffee grounds while a nitrogen-rich pile would

mostly contain grass clippings or fruit and vegetable peels. Make sure

you also build a “perfect” compost pile with good air circulation and a

balance of ingredients to control the experiment. What effect will differences

in the ingredients have on the finished compost?

Health effects of the ozone layer. link below