Man and most animals need a constan

Man and most animals need a constant supply of water to live. Farmers need water for their crops. Hydroelectric dams hold back needed water and provide water for homes and industries. Trees, grasses, and other plant life play an important part in the natural circulation of water, and thus help conserve it. Without plants most water would run off as soon as it falls, taking away valuable soil. Rapid runoff would cause frequently floods, and leave little water during dry seasons. Nature has many ways of conserving and controlling water. But man often upsets the water balance in his desire to grow more crops. He drains ponds, swamps, and wet lands. He ploughs under natural sods, cuts timber, and dredges and straightens streams. These changes reduce natural storage of water and speed runoff. Water can be held on the land by planting vegetation. Forests and grass should be planted where there are no natural growths. Dams built across rivers help hold back the water. Reservoirs behind the dams store water during wet seasons for use in dry seasons. Dams help prevent floods by controlling the flow of water. Many towns and cities get their water from nearby lakes and rivers. Some communities dump sewage and garbage into the water, making it unfit to drink. Water pollution is one of our most serious problems. Progressive cities have sewage treatment plants. These plants return only safe water to the streams or lakes. Many states have laws that prohibit companies from dumping raw industrial wastes, such as liquids from a metal – planting factory, into streams. These wastes often endanger the supply of drinking water. They also kill fish. Most industrial wastes can be treated to make them harmless.

Kết quả (Anh) 1:

Man and most animals need a constant supply of water to live. Farmers need water for their crops. Hydroelectric dams hold back needed water and provide water for homes and industries. Trees, grasses, and other plant life play an important part in the natural circulation of water, and thus help conserve it. Without the most water would run off the plants as soon as it falls, taking away valuable soil. Rapid runoff would cause frequently floods, and leave little water during dry seasons. Nature has many ways of conserving and controlling water. But man often upsets the water balance in his desire to grow more crops. He drains ponds, swamps, and wet lands. He ploughs under natural sods, cuts, timber and dredges and straightens streams. These changes reduce natural storage of water runoff and speed. Water can be held on the land by planting vegetation. Forests and grass should be planted where there are no natural growths. Dams built across rivers help hold back the water. Reservoirs behind the dams store water during wet seasons for use in dry seasons. Dams help prevent floods by controlling the flow of water. Many towns and cities get their water from nearby lakes and rivers. Some communities dump sewage and garbage into the water, making it unfit to drink. Water pollution is one of our most serious problems. Progressive cities have sewage treatment plants. These plants return only with safe water to the streams or lakes. Many states have laws that prohibit companies from dumping raw industrial wastes, such as liquids from a metal-planting factory, into streams. These wastes often endanger the supply of drinking water. They also kill fish. Most industrial wastes can be treated to make them harmless.

Kết quả (Anh) 2:

Man and animals need a constant supply nhất of water to live. Farmers need water for có cropper. Hydroelectric dams hold back needed water and water for homes and industries cung. Trees, grasses, and other plant life play an important, part in the natural circulation of water, and thì help Conserve it. Without water nhất plants as soon as would tremble it falls off, taking away Valuable soil. Rapid runoff would cause, Frequently floods, and leave little trace khi dry seasons. Nature has many Ways of conserving and khiển water. But upsets the water balance often Do Man In His desire to grow more cropper. He Drains ponds, swamps, and wet lands. He gritters sods under natural, timber cuts, and dredges and straightens streams. These changes Reduce storage of natural water runoff and speed. Water can be on the land by planting giữ Vegetation. Forests and planted grass where there are nên no natural growths. Dams built across rivers help hold back the water. Reservoirs behind the dams store water for use printed khi dry seasons wet seasons. Dams help Prevent floods by Controlling the flow of water. Towns and cities get many from nearby lakes and water chúng rivers. Some sewage and garbage dump Communities Into the water, making it Unfit to drink. Water pollution is one of our serious problems nhất. Sewage treatment plants have progressive cities. These plants only safe return water to the streams or lakes. Many states have laws mà Prohibit companies from dumping raw industrial wastes, from a metal như Liquids - planting factory, Into streams. These wastes often Do endanger the supply of drinking water. They kill fish cũng. Most industrial wastes can be Treated to make added Harmless.