Video Transcript
Water pollution can occur as a
result of many different types of pollution. Which of the following is not a
type of pollution that contributes to the pollution of water? (A) Biological pollution, (B)
chemical pollution, (C) light pollution, (D) thermal pollution, (E) radiant
pollution.
Water pollution is the
contamination of water sources. We are told in the question that
many different types of pollution contribute to water pollution. We need to determine which of the
answer choices is not a type of pollution that contributes to water pollution.
Biological pollution is caused when
human and animal waste is disposed of in water sources, such as rivers and
lakes. Biological pollution can lead to
the spread of diseases such as bilharzia, typhoid, and hepatitis. As biological pollution is a type
of pollution that contributes to the pollution of water, we can eliminate answer
choice (A).
Chemical pollution is due to
chemical waste. Chemical pollution often originates
from factories. Chemical pollution can lead to an
increase in harmful substances in the water, such as mercury and lead, which can
result in damage to the brain and other organs. As chemical pollution can
contribute to the pollution of water, we can eliminate answer choice (B).
Light pollution is unwanted or
excessive light caused by street lights and illuminated buildings. Light pollution changes nighttime
visibility and can disorient migratory animals, such as birds, bats, and
butterflies. Light pollution does not affect
water sources, so answer choice (C) is likely the answer to this question. Just to be sure, let’s take a look
at answer choices (D) and (E).
Nuclear power plants use water to
cool the reactor. As water is cycled through the
power plant, the temperature of the water gradually increases. When this water is released back to
the source, it will be at a higher temperature. This is an example of thermal
pollution, the artificial change in temperature of a water source. Changing water temperatures can
affect the amount of oxygen in the water, which can have disastrous effects on
marine organisms in the area.
Nuclear power plants may also
contribute to radiant pollution. Radiant pollution is a rise in
radiation levels. The radiation levels of water may
rise if nuclear reactors leak radioactive substances. Thermal pollution and radiant
pollution can contribute to the pollution of water.
Therefore, answer choices (D) and
(E) cannot be the answer to the question.
In conclusion, the type of
pollution that does not contribute to the pollution of water is light pollution,
answer choice (C).
