There are many kinds of natural resources on the earth. We use natural resources every day. Air, water, soil, plants, and animals are some important resources we use. Without them, we would not be able to survive.

People have changed the earth in many ways. We cut down trees to build homes and buildings. We make dams to hold water. We pave roads and construct bridges. We dig in the ground to find fuels such as coal, oil, and gas.

However, we need to be careful about the changes we make. Some changes could cause problems to the earth. If we cut down too many trees, animals must find new homes and food. If they cannot do these things, they will die. When we make pollution, we harm natural resources. If the water and air are not clean, we cannot use them. Plants and animals could also die. We need to use fewer resources and protect more plants and animals.

地球上有許多天然資源。 我們每天都在使用天然資源。 空氣、水、土壤、植物和動物都是我們所使用的重要資源， 沒有這些資源，我們就無法生存。

人類已經用許多方式改變了地球。 我們砍伐樹木來建造房子和大樓； 我們興建水壩來儲水； 我們鋪路、造橋； 我們挖地尋找煤礦、石油和天然氣等燃料。

然而，我們必須小心我們所做的改變， 有些改變可能會對地球造成傷害。 如果我們砍伐太多樹木，動物就必須尋找新的家園和食物。 如果牠們無法做到，就會死亡。

當我們製造汙染時，就危害了天然資源。 如果水和空氣不乾淨，我們就無法使用， 植物和動物也可能因而死亡。