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.
Currently, the LOTT study is underway to see if ambulatory oxygen may be beneficial in patients with COPD and low-normal levels of oxygen. In addition, there are possible negative effects of oxygen, including the possibility of carbon dioxide retention, potential oxygen toxicity, and the hazards of transporting and storing the stuff. Not to mention the dangers of having inflammable substance being used by a smoker.