Water pollution is a major global problem which requires ongoing evaluation
and revision of water resource policy at all levels (international down to
individual aquifers and wells). It has been suggested that it is the leading
worldwide cause of deaths and diseases, and that it accounts for the deaths of
more than 14,000 people daily. An estimated 700 million Indians have no access
to a proper toilet, and 1,000 Indian children die of diarrheal sickness every
day. Some 90% of China's cities suffer from some degree of water pollution, and
nearly 500 million people lack access to safe drinking water. In addition to
the acute problems of water pollution in developing countries, developed
countries continue to struggle with pollution problems as well. In the most
recent national report on water quality in the United States, 45 percent of
assessed stream miles, 47 percent of assessed lake acres, and 32 percent of
assessed bays and estuarine square miles were classified as polluted. Water is
typically referred to as polluted when it is impaired by anthropogenic
contaminants and either does not support a human use, such as drinking water,
and/or undergoes a marked shift in its ability to support its constituent
biotic communities, such as fish. Natural phenomena such as volcanoes, algae
blooms, storms, and earthquakes also cause major changes in water quality and
the ecological status of water.
Topic : Water Pollution
Topic Sentence : Water pollution is a major global problem which requires
ongoing evaluation and revision of water resource policy at all levels
(international down to individual aquifers and wells).
Supporting Details : (1) An estimated 700 million Indians have no access to
a proper toilet, and 1,000 Indian
children die of diarrheal sickness every day. Some 90% of China's cities suffer
from some degree of water pollution, and nearly 500 million people lack access
to safe drinking water.
(2)water pollution in developing countries, developed countries continue to
struggle with pollution problems as well.
(3) Water is typically referred to
as polluted when it is impaired by anthropogenic contaminants.
Conclusion : Natural phenomena such
as volcanoes, algae blooms, storms, and earthquakes also cause major changes in
water quality and the ecological status of water.
Linkers/Sequence Connectors used : (1) In addition.
(2) In the most.
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