You should spend about 20 minutes on this task.

The diagram below describes the process of making cement for the building industry .
Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

Write at least 150 words.

Write about the following topic:
Air pollution is currently a big issue in most industrialized cities causing respiratory problems and changes in weather patterns. 
What do you think are the causes of this?
What measures can be taken to reduce air pollution?
Give reasons for your answer and include any relevant examples from your own knowledge or experience