When the body<span> uses the </span>nutrients<span> in foods, a series of </span>chemical reactions<span> occur inside your cells. As a result, </span>energy<span> is released. Metabolism is the </span>chemical process<span> by which your </span>body breaks down<span> food to release this </span>energy<span>.</span>
They have increased the amount of certain organisms (a lot of crops and such) and made the soil healthier. Also, other organisms that may feed on this are having more food.