You should spend about 20 minutes on this task. The graph below shows the pollution levels in London between 1600 and 2000. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. <img src="--DELETED LINK-- alt="IELTS Writing Task 1"/>

The graph shows pollution

levels

in London between 1600 and 2000. It measures

smoke

and

sulphur

dioxide

in

micrograms

per cubic metre.

According to

the information, the

levels

of both pollutants formed a similar pattern during

this

period, but there were always higher

levels

of

sulphur

dioxide

than

smoke

in the atmosphere. (2nd paragraph describes the trends in more detail and illustrates these using data from the graph.) In 1600, pollution

levels

were low, but over the

next

hundred years, the

levels

of

sulphur

dioxide

rose to 700

micrograms

per cubic metre,

while

the

levels

of

smoke

rose gradually to about 200

micrograms

per cubic metre. Over the

next

two hundred years the

levels

of

sulphur

dioxide

continued to increase,

although

there was some fluctuation in

this

trend. They reached a peak in 1850.

Smoke

levels

increased a little more sharply during

this

time and peaked in 1900 at about 500

micrograms

. During the 20th century, the

levels

of both pollutants fell dramatically, though there was a great deal of fluctuation within

this

fall. (Final paragraph draws a simple conclusion from the data.)

Clearly

Add a comma

,Clearly

show examples

air pollution was a bigger problem in London in the early 20th century than it is now. (176 words)