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Renewable Resources - Resources, such as wind or water power, that will never run out.

Non-Renewable Resources - Resources, such as coal or oil, which cannot be replaced as they took millions years to be formed.

Natural Resources - Materials that humans choose to use.

Human Resources - the skills and abilities of the population.

Sustainable Resources - Resources, such as wood, that can be renewed if we act to replace them as we use.

Alternative Energy - Energy resource that provide an alternative to fossil fuel.