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.
Anemia is caused by a low production of red blood cells and hemoglobin, therefore low oxygen reaches cells throughout the body. Anemia usually results in low energy levels but can also affect many parts of the body â from poor brain function to low immunity (or the inability to fight off illnesses). The World Health Organization (WHO) estimates that approximately half of the 1.62 billion cases of anemia worldwide are due to iron deficiency, while the other half are due to genetic factors.