How much wood was harvested in 1991?
3.5 cubic kilometers
Why?
furniture and building construction.
How many meters of forest are there on our planet?
434 billion cubic meters
How much of that is available commercially?
47%
Can this be renewed?
yes
Is it rare?
no
How long has it been used in construction?
thousands of years
What is it's other main use?
fuel
What is it a composite of?
cellulose fibers
Are they weak?
no