| − | '''Global Warming''' is a phrase which commonly refers to a scientific theory and political proposals that would follow if the theory is accepted. The theory states that Earths' temperature and CO<sub>2</sub> levels are rising at a dangerous rate, and that humans need to take action against this percieved threat. | + | '''Global Warming''' is a phrase which commonly refers to a scientific theory and political proposals that would follow if the theory is accepted. The theory states that Earths' temperature and CO<sub>2</sub> levels are rising at a dangerous rate, and that humans need to take action against this perceived threat. |