Depending on the area seen in an individual picture, brown, yellow and green continents can be seen or parts of Earth can be covered by white clouds. Earth is by far the most dynamic planet when seen from space.
Oxygen therapy is a medical treatment. It must be prescribed by a doctor. For people with COPD, oxygen therapy can be a helpful part of their treatment plan. The prescription your doctor writes will include: If you need oxygen for rest, exercise and/or sleep, and how much in liters per minute (lpm) for each activity.
Studies have shown that oxygen in patients with COPD can prolong life, decrease the amount of red blood cells circulating in the blood stream (which is usually a good thing in patients with COPD because a low oxygen will result in an overproduction of red blood cells), improve blood flow through the lung, and improve thinking/reasoning.