Discussion forum to share school science, maths, sst and other subject projects, seminar and presentations for class 9 students of cbse, icse and other state boards in india. Natural resources class 9 notes science chapter 14 pdf download. Adapted for a new generation, al gore a downtoearth guide to global warming, laurie david and cambria gordon how do we know what we know about our changing climate. Download global warming presentations on authorstream. In his pursuit of comforts of life he ignored the threat of pollution and environmental degradation caused by industrialization. Powerpoint presentation global warming and the coming. Methane emissions also result from the decomposition of organic wastes in municipal solid waste landfills, and the raising of livestock.
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Global warming is also denoted by increase in the temperature of earth surface air and. Find resources on the global climate strike to share with your students. The greenhouse is covered with a kind of plastic walls which permits all radiations from the sun. This is where the term the greenhouse effect came from.
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But some countries are at higher risk from climate changes. Over the last 100 years, the average air temperature near the earths surface has risen by a little less than 1 degree celsius or 1. This is because the human body is not capable of coping with extreme temperatures for long period of time. Global warming is the increase of average temperature of the earths surface due to excessive amount of greenhouse gases such as carbon dioxide, carbon monoxide, cfc chlorofloro carbons etc. Personal contribution to global warming i contribute to global warming by driving a car daily around campus and also driving home every other weekend. The thicker layer of greenhouse gases traps more heat. Global warming is the warming of the earth through carbon dioxide co2 being pumped into the atmosphere from tailpipes and smokestacks. Most people are still unaware of global warming and do not consider it. Bau energy use results in a doubling of the rate of global energy use in 50 years in an era which will be characterized by tightening energy supplies. All of these three things are required for the existence of life forms. This is regularly caused by human activity, the burning of fossil fuels pumps co2, methane and other greenhouse gases into the atmosphere. Mar 28, 2017 natural resources part 22 green house effect cbse class 9. The troposphere has a thick layer of carbon dioxide and this layer of carbon dioxide serves. This change has disturbed the climatic pattern of the earth.
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Naturally occurring greenhouse gases have a mean warming effect of about 33 c 59 f. Most people are still unaware of global warming and do not consider it to be a big problem in years to. Climate change is a hot topic which is subject to a lot of academic debate. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. The wri report is entirely designed to blame developing countries for sharing the responsibility for global warming.
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Studies indicate that the average global surface temperature has increased by approximately 0. Global warming is the gradual heating of the earths surface, atmosphere and oceans. May 17, 2011 global warming, is harming and killing algae in the ocean. According to the stern report, australia is among the mostrisked countries, as the emission of greenhouse gases is very high in australia and it is one of the main exporters of coal, the burning of which emits carbon dioxide. As the earth is getting hotter, disasters like hurricanes, droughts and floods are getting more frequent. Global warming powerpoint template for free download.
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