Pollution of rivers, lakes and seas is a major concern for people who seek to protect the environment. What are the possible causes of water pollution, and what effects does this have on animal life and human society?
An essential element of the ecosystem is
water
. Water
pollution
occurs when harmful chemicals or microorganisms are released into water
bodies, which results in the degradation of animal and human’s life quality.
The most common cause of water
pollution
is the direct disposal of industrial and human waste
into the surface water
. Another reason worth mentioning is the oil
spill.Since the dawn of industrialization, numerous factories have been discharging toxic chemical compounds such
as metallic sulfides or cyanides. When being introduced into lakes, rivers, and seas, these toxic wastes poison freshwater or saltwater animals and plants, subsequently
destroy the ecosystem. Even when the industrial waste
is buried in the ground, it can still permeate the soil to pollute the underground water
, thus
begin the process again.
Another cause of water
pollution
is human waste
. Various kinds of pathogenic bacteria live in human faeces, and they may cause gastrointestinal infection if they appear in the water
supply. Oil
spills are also
the reason for sea pollution
. Most of the marine animals cannot digest oil
, or cleanse the spilling oil
on their feathers. Therefore
, they will die soon unless there are human interventions. The spill also
adversely affect seawater, which damages the tourist industry of coastal regions.
To summarize, water
pollution
is mostly the result of oil
spills and industrial or human waste
disposal. It severely affects the environment and subsequently
the life of animals and human.Submitted by noppapat_k on
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Use cohesive linking words accurately and appropriately
Linking words are very important in your essay.
To score effectively on your IELTS exam, you should make an effort to implement short concise sentences coupled with linking words.
Almost every sentence in your essay should have a linking word of some sort.
In fact, the only sentences that can omit linking words are your background sentence and thesis.
Linking word examples:
- firstly
- secondly
- thirdly
- in additional
- moreover
- also
- for example
- for instance
- therefore
- however
- although
- even though
- despite