Wednesday, April 19, 2006

 

Lun's Cause and Effect Essay

Saving Ground Water for Posterity

Water resources include direct rainfall and that collected in rivers, lakes and under ground. As a matter of fact, individuals, industry, and agriculture all need to use fresh water. Today, there are many countries whose water resources are not enough. In the U.S., agriculture is the major consumer of water, using about 85% of all U.S. freshwater resources. Agriculture is the main reason for the decrease in ground water.

Ground water is a storage source that must be protected. Recently, ground water has been decreasing in many locations. Some of them are running out. For example, if we continue to allow people to pump ground water, the Ogallala aquifer, which hold water for the states of Nebraska, Oklahoma, and Texas, will probably become non-productive within 40 years. Once gone, ground water can take at least 100 years to come back.

Since agriculture needs a lot of water, people in many locations have to use ground water. All crops need massive amounts of water during growth. For example, 1 pound of corn requires about 1,400 pounds (175 gallons) of water to produce because the stem of corn is bigger and taller than that of wheat and beans. Also, the corn crops grow during summer. Therefore, corn needs a lot of water to sustain its growth. In the USA, some locations do not have enough surface water resources. But still, people plant corn there and try to make some money from corn. Since corn needs a lot of water, people have to use rivers, lakes and ground water. People have to pump ground water and use it.

We should change the agriculture system to limit the waste of ground water. For example, we should not plant corn in the areas where there isn’t enough surface water. If we don’t protect ground water resources, we won’t be able to leave any resources to future generations. Eventually, we won’t be able to survive on this planet.

Reference: http://dieoff.org/page40.htm

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