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.
Your body needs the right amount of iron. If you have too little iron, you may develop iron deficiency anemia. Causes of low iron levels include blood loss, poor diet, or an inability to absorb enough iron from foods. People at higher risk of having too little iron are young children and women who are pregnant or have periods. Too much iron can damage your body. Taking too many iron supplements can cause iron poisoning.