Plastics are man-made and many of them do not rot away like other materials.

This is a big problem. However, many plastics can be reused if they are sorted.

Bring in to class at least five clean things made of plastic that would have been thrown away.

Each one should have a special mark on it. Look for a small triangle with a number in it (the numbers go up to 7).

Put all things of number 1 together, then all things of number 2 and so on.

Now you have sorted the materials ready for recycling and they need not go into rubbish dumps and be wasted.