优质回答Natural resources are resources that occur naturally and are not made by humans. They can be classified into two categories: renewable and non-renewable resources.Renewable resources are those that can be replenished naturally, such as solar energy, wind energy, water, and forests. These resources can be used over and over again without depleting them.Non-renewable resources are those that cannot be replenished naturally, such as fossil fuels, minerals, and metals. Once these resources are depleted, they cannot be replaced.Natural resources play a vital role in the functioning of the earth's ecosystem and are essential for human survival. They are used for various purposes such as energy production, agriculture, construction, and manufacturing. However, the overuse and exploitation of these resources have led to environmental degradation and climate change.Therefore, it is important to use natural resources in a sustainable manner to ensure their availability for future generations. This can be achieved through conservation, recycling, and the use of renewable resources.

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