The diagram below shows how salt is removed from sea water to make it drinkable. Summarize the information by selecting and reporting the main features and comparisons where relevant.

The diagram shows the stages of removing salt from

seawaterwater

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seawater water

to make sweet

water

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.

Overall

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,

this

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process has four main phases.

First,

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salty

water

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is exrationed from the sea to the first

stage

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where

water

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is faced with a pre-treatment filter.

Then

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this

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vital liquid goes with high speed to the second step and is forced through a membrane which has a construction to

separates

Wrong verb form

separate

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water

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molecules from salt and impurities which come with

seawaterwater

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seawater water

.

This

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membrane consists of many small holes which just allow

water

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molecules of the same size as the holes can pass through

this

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to the next

stage

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. In the first two stages some

water

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which is not filtered gets back into the sea again which is called Filter backwash and Sea

water

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concentrates in order. Later, the third

stage

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is Post-treatment. It means

water

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cleaned with some chemicals

such

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as lime, chlorine and fluoride. After the

last

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three phases, the

last

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stage

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is a place for storage of the

water

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then

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this

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crucial drink which we call sweet

water

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and we can drink it through pipes to

integrated

Correct article usage

an integrated

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water

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supply system.