Reads like a home work problem to me.
Choose your key words and do a search. There should be plenty on the subject
on-line. Try looking in Agricola too.
"j.wallis" <j.wallis at ntlworld.com> wrote in message
news:Cbpq6.9953$t1.821957 at news6-win.server.ntlworld.com...
> "What would the consequences on civilisation be if trees were lost as a
> source of raw materials"
>> I would be grateful if anyone could suggest "reliable" web-sites where I
> find relevant information on the above title. Thanks in advance.
>> University of Nottingham, England.