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.
Even COPD patients without obstructive sleep apnea (OSA) may experience a drop in oxygen during sleep. COPD develops slowly and is rare in people under the age of 40. It is progressive, meaning that it does not go away and may worsen over time, depending on when treatment is initiated.