The diagrams* below show how glass containers, such as bottles, are produced and recycled.

The first flow diagram illustrates the process of

glass

Use synonyms

container production, and the second diagram shows steps in the process of recycling used

glass

Use synonyms

. We can see that

glass

Use synonyms

is made using three main raw materials

,

Remove the comma

apply

show examples

and that the manufacturing process consists of four distinct stages. It requires five steps to turn used

glass

Use synonyms

into new

glass

Use synonyms

products.

Linking Words

At

Change preposition

In

show examples

the first stage

in

Change preposition

of

show examples

the production of

glass

Use synonyms

, sand, soda ash, limestone and other chemicals are mixed together.

Next,

Linking Words

this

Linking Words

mixture is heated in a

glass

Use synonyms

furnace at approximately 1500℃ to produce molten

glass

Use synonyms

. The molten

glass

Use synonyms

can

then

Linking Words

be shaped, by blowing, to create the end products, namely

glass

Use synonyms

containers.

Glass

Use synonyms

recycling begins with the collection of used

glass

Use synonyms

products. The collected

glass

Use synonyms

is sorted

according to

Linking Words

its colour

,

Remove the comma

apply

show examples

and

then

Linking Words

washed in order to remove any impurities. At the fourth stage of recycling, the

glass

Use synonyms

is crushed and melted, and the resulting molten

glass

Use synonyms

can

finally

Linking Words

be moulded to create new items.