According to the World Wildlife Fund, if deforestation, or the clearing of trees, continues as it has been, 55 percent of the Amazon rain forest could be gone by 2030.Following are examples of Amazon rain forest animals that have already been affected by deforestation.(Mario Tama/Getty Images News/Getty Images).ccording to the World Wildlife Fund, if deforestation, or the clearing of trees, continues as it has been, 55 percent of the Amazon rain forest could be gone by 2030.
The three major causes of iron deficiency are: 1  Chronic or excessive bleeding. Long-term (chronic) bleeding is the most common cause of iron loss that leads to iron deficiency. 2  Decreased ability to absorb iron. Medicines that reduce stomach acids may cause iron absorption problems. 3  Insufficient iron intake.
Low levels of iron is the most common cause of anemia. This is known as iron-deficiency anemia, the most common type of anemia. Factors that can reduce the body's iron levels include: 1  Blood loss (caused by ulcers, some cancers, and other conditions; and, in women, during monthly periods).