Negative ion <span>occurs when an atom gains an electron (negative charge) it will have more electrons than protons.</span>
Animals, plants, fungi and bacteria use carbohydrates in varying ways. For plants, carbohydrates form a large part of their structure in the form of cellulose. Animals use carbohydrates primarily for energy, such as starch, glucose and other sugars. Bacteria use carbohydrates for both structure and energy.
<span>A gradual increase in atmospheric carbon dioxide would warm earths atmosphere becuse carbon dioxide is <em>a greenhouse gas</em></span>
