Nature has provided us with many kinds of resources. All most everything we use in our everyday life comes from Nature. The food we eat, the water we drink, the clothes we wear, the concrete and bricks to build our houses, the materials to make bikes we ride, etc, all come originally from Nature.
People have been making use of these natural supplies for thousands of years. With the development of technology and the increase of the population, the amount and range of mate rials taken has increased. It is estimated that this tread will continue in the years to come.
However, natural resouces are not in exhaustible. Some resources are already nearly used up. For example, the end of the world's fuel is already within sight. Such an essential daily item as water is in short supply in many parts of the world. We can no longer thoughtlessly use the many resources provided by. Nature. We must learn to conserve what remains.
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