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地球,是人类共同的家园,也是唯一的家园。现实是严峻的。人类虽然建立起一个高度发达的世界,可是过度开发资源,大肆破坏环境,无视生态平衡……就连赖以生存的粮食、空气和水也遭到了不同程度的污染。人类和其他生物一样,为了适应环境,经过了成百上千万年的漫长进化。环境恶化,人类必然为生存付出巨大代价。地球,是目前为止唯一适合人类生存的星球。这儿每一样东西都是独一无二,别的星球找不到的。这么一个神奇的地方,我们应该好好爱护
Earth is the common homeland of mankind and the only homeland. The reality is serious. Although mankind has established a highly developed world, it has excessively developed resources, destroyed the environment and ignored the ecological balance. Even the food, air and water that depend on it have also been polluted to varying degrees. Humans, like other creatures, have evolved through millions of years of evolution to adapt to the environment. As the environment deteriorates, mankind must pay a huge price for its existence. The Earth is by far the only planet suitable for human existence. Everything here is unique and can not be found on other planets. Such a magical place, we should take good care of