coal, copper, lead, iron, natural gas, timber, bauxite, and uranium.
<span>The phosphate enters the ecosystem and becomes tied up in the biogeochemical system where it is recycled. The rapid growth of aquatic vegetation and/or increase in the algal population can cause the death and decay of vegetation and aquatic life because of the decrease in dissolved oxygen levels.</span>
Gondwana<span> was an ancient supercontinent that broke up about 180 million years ago.</span>