Planned way of use of Non-renewable Resource

Planned way of use of Non-renewable Resource:
The problem of a future shortage of some of our important resources must be faced. The answer to the problem will be a combination of four approaches.
(a) Replying more heavily on renewable resources: If a non-renewable resource becomes scarce, its price goes up. This can result in alternative renewable resource becoming cheaper than the non- renewable resource, so the renewable resource will be used instead.
(b)Increasing product lifetime: We must try to make products made from non-renewable resources last longer. For example, most cars are made of steel, which contain large amount of iron. The iron rusts. If every car could be made to last longer, then less iron would be needed by the motor industry.
(c)Recycling: Much of what we throw away could be reused. Glass, for example, can be crushed, remelted and reused. Glass made in this way requires much less energy than glass made from starch. Many people already take their empty glass bottles to bottle banks. If more and more people were encouraged to do this, the amount of resources need to make new glass could be greatly reduced.
(d)Opening up new resources: Improved technology is continually allowing resources which were previously unavailable to be extracted from the Earth.