求写一篇人与环境的英语作文,要求很简单,一百词左右

Man multiplied and civilised by changing the environment to suit himself especially by the development of agriculture and industrialization.Our earliest ancestors lived in a rich and competitive world closely tied to environment.They knew the sources of water and use of plants and animals for food and shelter purposes.But they exploited the environment to fulfill their requirements,thus they could not cause excessive damage to environment due to their low population,nomadic way of life and primitive technology.
Throughout time we have exploited nature and its creatures for our own benefit.
We have developed a huge and thriving society; and in the process we deforest huge sections of land for living and livestock grazing.This decreases oxygen and increases carbon dioxide in the atmosphere; possiblyadding to global warming though the greenhouse effect.Modern transportation consume lots of non-renewable fossil fuels that put carbon monoxide,sulfur and nitrogen oxides and other harmful particulates into the atmosphere.This produces dangers like smog and cancer and contributes to global warming.
We only have one earth so,we must take precautions to preserve our environment,such as using recycle,environmental friendly bags instead of plastic bags,which will take years for it to disintegrade,save electricity and water to conserve energy,use public transport to go to work or have a car pool to reduce the production of harmful gases into the atmosphere.We all are the citizen of Earth,so we are responsible to take care of our environment.