2, 4-7 Although deep intramuscular injection into a large muscle is the preferred parenteral route of administration, promethazineâs product labeling states that it may be given by slow IV push, which is the typical method of administration in most hospitals.
Quick Answer. Plants produce oxygen as a byproduct of photosynthesis, the process that plants and other organisms use to create usable energy. Photosynthesis consists of carbon dioxide and water reacting in the presence of energy from sunlight, which produces glucose and oxygen.
That same acre of trees also produces enough oxygen for 18 people to breathe for a year.â. - New York Times.  A 100-ft tree, 18 diameter at its base, produces 6,000 pounds of oxygen.. - Northwest Territories Forest Management. On average, one tree produces nearly 260 pounds of oxygen each year.