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.
Iron Deficiency Anemia. Iron deficiency--the most common cause of anemia worldwide--can cause low iron levels and weight loss. Iron deficiency often results in decreased healthy red blood cells, or anemia. According to the University of Maryland Medical Center, your body needs iron to form hemoglobin.ron deficiency--the most common cause of anemia worldwide--can cause low iron levels and weight loss.