The main reason for pollution is something
which is no longer needed. Waste can be many
things: it can be yesterday’s newspaper, an old car,
your bath water, or from a factory
. Some waste is dangerous, because it
contains .This kind of waste is called
waste and it is worrying many governments today. If
you want to do something better than , you
can change waste into something different. You can
sort your waste so that paper, metal and clothes, for
example, can be sold to dealers for .