18. Which of the following statements is the
author's opinion about natural
resource
use?
(1) The problem of scarce raw materials
will be solved
by increased world
trade.
(2) No solutions are possible for
reasonable management of the
world's scarce raw materials.
(3) The world cannot afford to wait for a
new technology
to resolve natural
resource depletion.
(4) Wars will solve the problem of
decreasing supplies of raw materials.
(5)
By
stopping industrial development in
their economies
, developing nations
will solve
the problem of scarce
resources.