well know和famous有啥分别?

短文改错
As it well know,when senior students graduate from school.
most of their textbooks are thrown away from,which are still in
good condition.what waste of it!I quite agree to the
suggestion we should recycle these textbooks.for one thing,recycling
textbooks can save a lot of nature materials,which are used to
make textbooks.for other,senior students may have plenty of
useful notes on the pages.They are very helpful to those textbooks
users.whats worse,the cost of the books will unload some burden
of the families of the students .Actually in Australia and any other
countries,recycling textbooks are popular and it gives us a good example.
why cant we have a try?