I'm sure you all know how important recycling is. Recycling is when you take old things and turn them into new things. It sounds like magic. But it's actually very scientific.
Material：
The first thing you have to do is to collect items (物品) that can be recycled. Only certain materials can be recycled. These include things made of paper， metal， glass and plastic.
Daily things：
Can you think of everyday items made of these materials？ Soda cans are good example. They are made of metal. Magazines and newspaper are made of paper. So are milk boxes. Some bottles of juice are made of glass. Bags are made of plastic. There are many things that can be recycled.
Sign：
These things are usually signed with the recycling loop. It has 3 arrows (箭头) that go in a triangular (三角形) circle. This shows that cycle (循环) continues. Items are thrown away but continue their lives as something else.
Process：
Let's go back to the process of recycling. ①The items are put in a recycling bin. ②A truck carries the items to a recycling factory. ③The materials are separated and squashed (被压扁成) into square cubes. ④Companies buy and turn them into new products.
