Global Warming
We human beings are heating up our planet more than ever, and the outcomes of global warming have already affected our environments. Greenhouse gases in the atmosphere, such as carbon dioxides, help to keep our globe in a warm and congenial temperature for lives. However, our planet is now getting too warm due to overly human developments. By burning fossil fuels and clearing forests, we have produced excess amount of greenhouse gases that violates the environments unnaturally. While doing my research on this topic, it is amazing to discover that, in recent five years, at least 200 cities such as London, Taipei, and Shanghai have broken their hottest temperature records which have held for 10 to hundred years. That is, the global warming is happening, and it is indeed altering our environments. It has brought us unexpected effects to our climates, dramatic changes to our terrain features, and unrecoverable damages to our ecosystems.
First, rising temperature has not only brought us a warmer atmosphere, but also made our climate system run wild. Extreme weathers such as hot winters, early spring arrivals, tsunamis, heat waves, storms, heavy precipitations and droughts happen more frequently and more intense, and these are all considered to be related to global warming. For example, the number of heavy hurricanes has almost doubled in the last 30 years. (Emanuel, 2005) What’s more, people are now easily to compare that the temperatures are higher than before. This winter, we can find that most people in Taiwan still wear t-shirts and that only few cold currents visit our island. The winter comes later and many ski resorts in Europe are forced to close or use snowmakers because there are no enough snows for the visitors to ski. Sure, we can not link any particular climate event directly to global warming; however, it is undeniable that global warming is playing a really important role that triggers unusual climate patterns.
Next, in response to global warming, our terrain features, especially in the Polar Regions, alter sharply in comparison with the past few decades. Global warming accelerates ices near poles or in high mountains to melt. Last Friday, a huge chunk of ice bigger than the size of Manhattan broke from the ice shelf in Canada, which has been regarded as the biggest broke in recent 25 years. The same group of scientists also pointed out that the size of ice shelves in this region was ten times smaller than it used to be in 1906. (Jones, 2006) Global warming, once again, is one of the major causes. Researchers also discover the ice cap of Mount Kilimanjaro, the highest mountain in Africa, has shrunken 75% since 1972, and might disappear in 15 years. (TIME, 2001) If we cannot find a solution to this heating situation, our Arctic Ocean could be ice free in summer by 2050 (Adams, 2006). Moreover, the sea level is also responding the melting ice near the poles- it raises and submerges lands near coastlines. A group of scientists have proved that two India islands, Lohachara and Suparibhanga, have been swallowed up by the sea, making 10000 people homeless. (AFP, 2006) According to a documentary film called “The Inconvenient Truth,” the sea level would rise up to 6 meters as the ice keep melting; meanwhile, places near seacoast including Shanghai, Florida, Venice, Taiwan would soon be overwhelmed. A sequence of catastrophes could be predicted, and our terrain features will be totally different due to global warming.