Автор: Пользователь скрыл имя, 14 Апреля 2013 в 14:54, доклад
Fifty percent of the United States population depends on groundwater for daily drinking water. Groundwater is also one of our most important sources of irrigation water. Unfortunately, groundwater is susceptible to pollutants. Groundwater is generally a safe source of drinking water, however, there are concerns that contamination may increase as toxins dumped on the ground in the past make their way into groundwater supplies.