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. Two mature trees can provide enough oxygen for a family of four. - Environment Canada, Canada's national environmental agency
Tuberculosis is a chronic disease of the respiratory system that usually enters the body through the trunk, the windpipe [trachea], and the lungs. Tuberculosis is a bacterial disease (Mycobacterium spp.) that can infect both elephants and humans.reatment: 1  Immediately separate the elephant from other animals in the herd. 2  Take the elephant to a shady, clean, and quiet place. 3  Feed the elephant with highly nutritious food that is easy to swallow, such as ripe bananas or other fresh fruit.
Media caption Many animal rights activists have been protesting against the use of elephants in the circus. One of America's largest circus companies has said it will phase out the use of elephants in its shows. The Ringling Brothers and Barnum & Bailey Circus told that it plans to stop using the animals by 2018.It said growing public concern about how the animals are treated led to the decision.The company's 43 elephants will live at an animal conservation centre in Florida. The circus will continue to use other animals-such as lions, tigers, horses, camels, and dogs-in its performances.In recent years, some cities and counties have passed laws banning the use of elephants for entertainment, which has complicated the show's tours, company president Kenneth Feld.t said growing public concern about how the animals are treated led to the decision. The company's 43 elephants will live at an animal conservation centre in Florida. The circus will continue to use other animals-such as lions, tigers, horses, camels, and dogs-in its performances.