Conditions affecting the hearing bones: otosclerosis. Otosclerosis is the most common cause of hearing loss in young people. It's a condition of abnormal bone growth affecting the stapes, the third of the three little bones in the middle ear.
Hydroelectric dams use water to produce electricity. Natural water resources include lakes, rivers, streams, ice pack, groundwater, precipitation and oceans. As global climate change begins to affect the distribution of water resources in the United States, water use in all sectors is coming under increasing scrutiny.
Natural resources include water, fuel, soil, land and air. Depletion of these resources produces competition among living organisms for the remaining portions, and diminishes the quality of available resources. Of the life-sustaining natural resources for humans, plants and animals, water ranks high on the list of the most basic and important elements.