people have been living on the earth for thousands of years.humanactivity influences the earth. some people believe that theearth isbeing harmed by human activity. others feel that humanactivitymakes the earth a better place to live. in my opinion, theearth isbeing damaged by human activity. there are manystatementssupporting my opinion.

　　human activity has damaged natural environment and almostexaustednatural resources. modern industry needs more and moreresources,including minerals, fuels and water. so we confront ofthe seriousproblems such as the lack of fuels and water.ecological balance isdamaged because factories occupy many placeswhere animals andplants live. more and more buildings areconstructed and forestsbecome less and less. if we cannotrecognize these problems andsolve them soon, we would finally losethe environment suitable forour living.an other serious problem is the green-house effect.humanactivity decreases forests and increases the usage of fuels sothatthe gas of carbon dioxide is output more and more and there arenotenough plants to absorb it. the green-house effect is moreobviousand more sensible these years. due to the effect, icebergsin thesouth polar and north polar melt and the sea level becomeshigherthan before. i am worried about the cities nearby the sea andhopescientists find an effective method to eliminate thegreen-houseeffect.

　　although we have advanced machines and our life seemsmorecomfortable than before, we have less chances to approachnaturesand less spaces to act. the cities become bigger and if wewant tohave a picnic with our friends, we have to drive a longdistance tofind a natural place. in fact, the spaces of humanactivity arebeing damaged by the skyscrapers and factories.from the above statements, we can conclude that humanactivitybrings the earth many damages. fortunately people haverecognizedthe point and i believe that the earth will become abetter placeto live with our ceaseless efforts.