Some people believe that the Earth is being harmed or damaged by human activity. Others feel that human activity makes the Earth a better place to live. What is your opinion? Use specific reasons and examples to support your answer.
　　Human activity is harming our planet slowly. Until recently no one thought that human actions could affect our planet on a global scale. Some scientists now believe that for the first time in recorded history such actions are occurring. Environmental problems have thus become an international issue, thanks to increasing threats to wildlife and man-made pollution.
　　The habitat of flora and fauna has been losing ground. It remains unclear how many species of plants and animals on earth have been wiped out or killed off since the Industrial Revolution. And how many more are disappearing at an alarming rate to the point of extinction because of deforestation and hunting. It is as if anything humans touch is doomed. The biodiversity--living things and the relationships among them--demands attention. If little or nothing is timely done to stop the trend, humankind as species might also be doomed.
　　Not only our earth is losing its important natural resources, but also is being polluted, especially in industrialized and urbanized areas. So much so we are contaminating what we cherish most in life for free--clean air and clear water. Many rivers and lakes and seas are no longer pure and natural as they used to be for wildlife to exist in them. To make things worse, pollution of gases such as carbon dioxide from factories and automobiles produces ozone-depletion in a phenomenon known as greenhouse effect. The result is said to be directly related to global warming, which in turn creates floods and droughts on the planet. The climate change is threatening the earth by raising sea levels and pushing temperatures gradually higher.
　　Protecting the natural mechanisms and preventing pollution are two hard tasks to deal with internationally. The good news is that there is an increasing awareness of the dangers human beings are in. In certain crucial fields, however, too little is done too late. An urgent commitment worldwide is therefore needed to maintain ecosystem, saving Nature for Nature’s sake. Otherwise, mankind’s road to eventual doom is sure, although very slow. Harming the earth is easy like pulling bricks from a big wall. Human beings may keep doing it until the wall suddenly collapses.