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

Correct your spelling

seawater water

to make sweet

water

.

Overall

,

this

process has four main phases.

First,

salty

water

is exrationed from the sea to the first

stage

where

water

is faced with a pre-treatment filter.

Then

this

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

molecules from salt and impurities which come with

seawaterwater

Correct your spelling

seawater water

.

This

membrane consists of many small holes which just allow

water

molecules of the same size as the holes can pass through

this

to the next

stage

. In the first two stages some

water

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

water

concentrates in order. Later, the third

stage

is Post-treatment. It means

water

cleaned with some chemicals

such

as lime, chlorine and fluoride. After the

last

three phases, the

last

stage

is a place for storage of the

water

then

this

crucial drink which we call sweet

water

and we can drink it through pipes to

integrated

Correct article usage

an integrated

show examples

water

supply system.