A Presentation on Global Warming:Prepared ByNidhi Goyal
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.
CAUSES OF GLOBAL WARMING Causes of global warming• Carbon dioxide emissions from fossil fuel burning power plants• Carbon dioxide emissions from burning gasoline for transportation• Methane emissions from animals, agriculture such as rice paddies, and from Arctic seabeds• Deforestation, especially tropical forests for wood, pulp, and farmland• Increase in usage of chemical fertilizers on croplands
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.
PROBLEMS FACED We are all personally responsible for releasing carbon dioxide into the atmosphere by burning fossil fuels for transportation (driving and flying) and home energy (electricity, heating, and cooling). This leads to global warming, which is destroying Earths biodiversity and native ecosystems.
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 and conservation project accomplishments since 1999, every $10 donation allows us to sponsor one Apprentice Ecologist and plant 3.1 native trees.
Benefits of planting native trees• They help stop global warming by reducing greenhouse gases• They reduce soil erosion and water pollution• They provide habitat for native wildlife (including songbirds)• They improve human health by producing oxygen and improving air quality• They reduce home energy needs by providing shade in summer and a windbreak in winter• Facts about the benefits provided by planting one tree
• Absorbs over a ton of harmful greenhouse gases over its lifetime• Produces enough oxygen for four people every day• Provides the equivalent cooling effect of ten room-size air conditioners operating 20 hours a day• Provides an estimated $273 of environmental benefits in every year of its life
CONCLUSIONS• SOLAR PANELS Can Help Fight GlobalWarming• Many efforts are being made by various nations to cut down the rate of global warming. One such effort is the Kyoto agreement that has been made between various nations to reduce the emissions of various green house gases.• Also many non profit organizations are working for the cause. Example :- Green Yatra.
CONCLUSIONS• But an interesting side of the global warming episode is that there are people who do not consider global warming as something that is creating a problem. Skeptics of global warming think that global warming is not an ecological trouble. According to them earths coastlines and polar ice caps are not at a risk of vanishing. Global warming skeptics consider that the weather models used to establish global warming and to forecast its impacts are distorted. Most of the global warming skeptics believe that the global warming is not actually occurring. They stress on the fact the climatic conditions vary because of volcanism, the obliquity cycle, changes in solar output, and internal variability. The variations are also a result of cosmic ray flux that is modulated by the solar magnetic cycles.