A presentation on global warming newe

Download A presentation on global warming newe

Post on 07-May-2015



News & Politics

4 download

Embed Size (px)


  • 1.A Presentation on Global Warming:Prepared ByNidhi Goyal

2. INTRODUCTIONWhat is global warming-.Global warming is the rise in the average temperature of Earthsatmosphere and oceans since the late 19th century, and its projectedcontinuation.. Since the early 20th century, Earths mean surface temperature hasincreased by about 0.8 C (1.4 F), with about two-thirds of the increaseoccurring since 1980..Warming of the climate system is unequivocal, and scientists are more than90% certain that it is primarily caused by increasing concentrations ofgreenhouse gases produced by human activities such as deforestation andthe burning of fossil fuels.. These findings are recognized by the national science academies of allmajor industrialized nations. 3. CAUSES OF GLOBAL WARMINGCauses of global warming Carbon dioxide emissions from fossil fuelburning power plants Carbon dioxide emissions from burning gasolinefor transportation Methane emissions from animals, agriculturesuch as rice paddies, and from Arctic seabeds Deforestation, especially tropical forests forwood, pulp, and farmland Increase in usage of chemical fertilizers oncroplands 4. EFFECTS OF GLOBAL WARMING. Rise in sea levels worldwide More killer storms Massive crop failures Widespread extinction of species Disappearance of coral reefs .Various diseases due to Ebola, hanta andmachupo virus are expected due to warmerclimates. 5. PROBLEMS FACEDWe are all personally responsible for releasing carbon dioxide intothe atmosphere by burning fossil fuels for transportation(driving and flying) and homeenergy (electricity, heating, and cooling). This leads to global warming, which isdestroying Earths biodiversity andnative ecosystems. 6. SOLUTIONS Reduce your use of fossil fuels Protect native forests as "carbon storehouses" Help plant native trees in urban and deforested areas Volunteer for NWP Donate to NWP. Based on NWP total program costs andconservation project accomplishments since 1999, every $10donation allows us to sponsor one Apprentice Ecologist andplant 3.1 native trees. 7. Benefits of planting native trees They help stop global warming by reducinggreenhouse gases They reduce soil erosion and waterpollution They provide habitat for native wildlife(including songbirds) They improve human health by producingoxygen and improving air quality They reduce home energy needs byproviding shade in summer and awindbreak in winter Facts about the benefits provided byplanting one tree 8. Absorbs over a ton of harmfulgreenhouse gases over its lifetime Produces enough oxygen for fourpeople every day Provides the equivalent coolingeffect of ten room-size airconditioners operating 20 hours aday Provides an estimated $273 ofenvironmental benefits in everyyear of its life 9. CONCLUSIONS SOLAR PANELS Can Help Fight GlobalWarming Many efforts are being made byvarious nations to cut down the rate ofglobal warming. One such effort is theKyoto agreement that has beenmade between various nations toreduce the emissions of various greenhouse gases. Also many non profit organizationsare working for the cause. Example :-Green Yatra. 10. CONCLUSIONS But an interesting side of the global warming episode is that thereare people who do not consider global warming as something thatis creating a problem. Skeptics of global warming think that globalwarming is not an ecological trouble. According to them earthscoastlines and polar ice caps are not at a risk of vanishing. Globalwarming skeptics consider that the weather models used toestablish global warming and to forecast its impacts are distorted.Most of the global warming skeptics believe that the globalwarming is not actually occurring. They stress on the fact theclimatic conditions vary because of volcanism, the obliquity cycle,changes in solar output, and internal variability. The variations arealso a result of cosmic ray flux that is modulated by the solarmagnetic cycles.