The diagram below shows the process by which bricks are manufactured for the building industry. Summarise the information by selecting and reporting the main features and make comparisons where relevant.

A glance at the figure provided illustrates the process of producing brick. In general, bricks are environmentally unfriendly products, since, the warmth involved in

this

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process is incredibly high and intensifies global warming.

First,

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the raw material for brick manufacturing which is a type of sticky earth named clay is excavated by diggers. Having passed them through a metal grid into a roller machine, they are

then

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separated from useless big pieces of stones. The acquired substances are

next,

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blended with sand and water and poured into a mould or a bigger container which demands wire to cut them into a standard size of brick. Yet, the gained bricks are smooth and should be dried in an oven for 24 to 48 hours. After that, they are transferred into the first kiln at a moderate temperature and

then

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the second kiln at 870 to 1300 centigrade.

Finally

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, they are kept in a cooling chamber for 48 to 72 hours. Afterwards, they are ready to be packed and delivered.