Over the course of years, human's wisdom has brought us advanced science and technology, and increasing economy makes people live a happy life.There's no doubt that human activities send us convenience and comfort.However, the fact always go beyond people's expectations.Enironment goes dreadful as our society becomes stronger because of human activities.This phenomenon gives rise to a hot debate on how to review human activities.On the one hand, some people believe that the earth is being harmed by human activities.What pollute the air and water now is wasted gas and garbage floating around us.Because of exceed carbon dioxide, global warming has become worse and worse, which has led to varies of natural disasters, and at the same time, ozone, which protect us from ultraviolet rays, reduce little by little.Enironment problem has become another potential disaster.As we all know, no one could be alive if what we breathe and drink become poisonous.However, on the other hand, others feel that human activities make the earth a better place to live.With modern equipment and traffic, living more comfortable and convenient rather than sending letters for communicating, ridding horses for traveling and living in thatched cottage for life has become possible.Though enironment problem has confused human for decades, technology will crash them one by one.As far as I'm concerned, we cannot deny the fact that successes and challenges do exist today.Human activities offer us better living conditions and enironment pollution because of the ignorance of side-effects by developing industries.Since the trend of development cannot be prevented, we must take measures to balance.Bases on the advanced technology, although difficulties do stand in front of us to some extent, we have enough reasons to believe that activities can be less harm one day, and the solvent eventually be presented.