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Global warming and natural disaster“Global warming” has been introduced by the scientific community and the media as the term that encompasses all potential changes in climate that result from higher average global temperatures. Hundreds of scientists from many different countries are working to understand global warming and have come to a consensus on several important aspects. In general, Global warming will produce far more profound climatic changes than simply a rise in global temperature. An analysis of temperature records shows that the Earth has warmed an average of 0.5°C over the past 100 years. This is consistent with predictions of global warming due to an enhanced greenhouse effect and increased aerosols. Part of the current global warmth is associated with the tropical El Nino, without which a record global temperature would probably not have occurred. The Earth's climate is the result of extremely complex interactions among the atmosphere, the oceans, the land masses, and living organisms, which are all warmed daily by the sun's energy. This heat would radiate back into space if not for the atmosphere, which relies on a delicate balance of heat-trapping gases - including water vapor, carbon dioxide, nitrous oxide, and methane - to act as a natural "greenhouse," keeping in just the right amount of the sun's energy to support life. For the past 150 years, though, the atmospheric concentrations of these gases, particularly carbon dioxide, have been rising. As a result, more heat is being trapped than previously, which in turn is causing the global temperature to rise. Climate scientists have linked the increased levels of heat-trapping gases in the atmosphere to human activities, in particular the burning of fossil fuels (coal, oil, and natural gas for heating and electricity; gasoline for transportation), deforestation, cattle ranching, and rice farming. As the Earth's climate is the result of extremely complex interactions, scientists still cannot predict the exact impact on the earth's climate of these rising levels of heat-trapping gases over the next century. The current best estimate is that if carbon dioxide concentrations double over preindustrial levels, according to the scientific possible scenarios, an atmospheric doubling of carbon dioxide could occur as early as 2050. In 1995, scientists with the Intergovernmental Panel on Climate Change - the authoritative international body charged with studying this issue-reached a conclusion in the Second Assessment Report, which summarizes the current state of scientific knowledge on global warming, also called climate change. For the first time ever, the Panel concluded that the observed increase in global average temperature over the last century "is unlikely to be entirely natural in origin" and that "the balance of evidence suggests that there is a discernible human influence on global climate." Natural Disasters Related to Global Warming Global warming may become a serious threat to Earth. One of the world's most controversial debates in recent years has been about global warming and whether it's affecting Earth. Universities throughout the world and the United Nations have conducted studies that link global warming to the increase in natural disasters, including earthquakes, wildfires and flooding. Most of the disasters attributed to global warming result from the melting of the polar icecaps. Wildfires The rapid spread of wildfires in the western United States could result from global warming, if it increases the world's temperature by one degree. This prediction is based on how trees absorb carbon dioxide, which is the primary greenhouse gas in Earth's atmosphere, and release oxygen. According to investigative journalist Amy Goodman, writing in "Seattle P.I.", the forests in the western states remove up to 40 percent of carbon dioxide in the United States. If too many trees burn from wildfire, there will not be enough to remove the carbon dioxide, which would cause temperatures to rise and more wildfires. One organization, the grassroots "Step It Up," raises awareness of wildfires caused by global warming and how they pose a serious threat to Earth. Flooding According to the British newspaper, the "Guardian," experts believe that global warming will cause Earth's polar caps to melt, which will result in massive flooding. Studies in 2009 by the University of Northern Arizona revealed temperatures in the Arctic Circle, or the North Pole, were the highest they had been in the previous 2,000 years. The Middle East nation of Pakistan experienced an increase in floods in the summer of 2010, which was attributed to the melting of glaciers in the nearby Himalayan mountain range. In 2007, the United Nations released a public statement that linked flooding to global warming. Earthquakes One consequence of melting polar caps by global warming is the increasing frequency of earthquakes. These natural disasters occur as a result of the disintegration of glaciers in the Arctic Circle. The glaciers in this region of the planet act as a weight on Earth's crust. If the ice is removed, Earth's crust will rebound, or move upward. This will result in the shifting of tectonic plates, which, in turn, causes earthquakes. According to Live Science, scientists believe that Earth's current crustal rebounding could be caused by the melting at the end of the previous Ice Age. An increase in earthquakes will also cause an increase in tsunamis. 10. A friend in need is a friend indeed The proverb “A friend in need is a friend indeed” is one of the most known proverbs, and it teaches you that a real friend is a person who is there for you when you need him, it helps you when you have a problem, it keeps your secrets, shares things with you, bares you with all your qualities and defects. Of course, you have to treat all your friends the way you want to be treated and you always have to tell your friend the true, this is the only way to keep a real friend. The word 'friendship' has become very cheap in the modern times. We call everybody who comes into our contact our friend. Mere acquaintances or those with whom we work because of our posting at a certain place cannot be called friends. Even our neighbors and those whom we frequently meet in our social dealings are not necessarily our friends. Friendship is something noble and great but very rare. A good friend is one of man's most precious possessions. It is also true that without friends man's life is dry, dull and dreary. The company of friend's makes life happy, interesting and worth living. A true friend understands us, appreciates our circumstances and problems and shares our joys and misfortunes. He is our counsellor and guide. He is a source of joy, strength and courage. He increases our pleasure in prosperity and lessens our sorrows and sufferings in adversity. When we are rich, prosperous and powerful, a flock of people gather around us and claim to be our sincere friends. I think nobody could live without friends, no matter how rich or intelligent you are. Friendship is the most important term to keep peace on the Earth. Without it nobody could live happily at the planet. The real worth of these people is known when we fall on bad days. Fair-weather friends leave us in the lurch. Those who stand by us through thick and thin are our real friends. Поиск по сайту: |
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