题目内容：
根据下面资料，回答题 Resources
Resourees are found in nature. They make a better quality of life for humans. Soil, air, water,sunlight and trees are all examples of resources that humans use every day, whether they know it ornot. 26
A natural resource is a material found in nature and used by living things. Air, rocks, metals,oil and salt are all natural resources. Renewable (可再生的) resources are resources that can bereplaced. 27 Trees that are cut down can be replaced quickly when seeds or baby trees areplanted. Water from our bathtubs (浴盆) can be cleaned for use. Plants, wind and rain can helpclean the air to make it safe to breathe even if it comes out of a car or a factory.
Sometimes resources cannot be replaced after they are used. 28 Once nonrenewable
resources are all used up, nature will not be able to replace them. Oil, natural gas, soil and metalsare all examples of nonrenewable resources.
Coal is another example of a nonrenewable resource. 29 Humans mine the coalunderground and use it as an energy source. Once humans have mined all the coal from insideEarth, there will be no more for us to depend on. 30 For example, wind and water turbines(涡轮机) are now being used to produce energy.produce energy.
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