When they are degraded, it can set off a devastating chain of events both locally and around the world. Loss of species: Seventy percent of the worldâs plants and animals live in forests and are losing their habitats to deforestation, according to National Geographic.Loss of habitat can lead to species extinction.hen they are degraded, it can set off a devastating chain of events both locally and around the world. Loss of species: Seventy percent of the worldâs plants and animals live in forests and are losing their habitats to deforestation, according to National Geographic.
Causes of iron deficiency anemia include: 1  Blood loss. Blood contains iron within red blood cells. 2  A lack of iron in your diet. Your body regularly gets iron from the foods you eat. 3  An inability to absorb iron. Iron from food is absorbed into your bloodstream in your small intestine.  Pregnancy.
The most common cause of iron deficiency anemia is gradual, prolonged blood loss. For this reason, menstruating women are particularly prone to anemia. In men, the most common cause of iron deficiency is blood loss in the digestive tract, resulting from disorders such as peptic ulcer, inflammatory bowel disease, and stomach or colon cancer. Sometimes hemorrhoids bleed enough to result in anemia.