Copy Of Global Warming
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Copy Of Global Warming

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global warming

global warming

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    Copy Of Global Warming Copy Of Global Warming Presentation Transcript

    • The human-induced climate change is already occurring and that future change is inevitable.
    • This summer's heat is consistent with a long-term warming trend and looks to be one of the hottest summers on record.
    • People dying of heat stroke!
    • Global warming is one of the most serious challenges facing us today.
    • Global warming is A rise in temperature of the Earth caused by emissions of carbon dioxide and other heat-trapping gases that are emitted primarily by the burning of fossil fuels and the clearing of forests. These gases remain in our atmosphere for decades or even centuries.
    • The atmosphere around us is made up of gases. Some of these gases function like the panes of a greenhouse: they let some radiation from the sun in but also retain heat in the atmosphere, that is: they don't let all radiation back out. As a result of this natural effect, it is warmer on Earth than it would be without these heat-trapping gases.This is called the greenhouse effect.
    • Human contributions of certain gases to the atmosphere have increased this greenhouse effect resulting in GLOBAL WARMING.
    • World's leading climate scientists feel that the Earth's temperature is rising and that its climate has changed over the last century. The scientific consensus is clear that the rise in temperature and change in climate are being caused in part by human activities.
    • Causes of global warming •Ozone hole • heat-trapping-gases • aerosol emissions •over population •overuse of energy • economic growth • land use changes •Burning of fossil fuels •Cement manufacture •Deforestation
    • What is Ozone? Ozone is a colorless gas. Chemically, ozone is very active; it reacts readily with a great many other substances. Near the Earth’s surface, those reactions cause rubber to crack, hurt plant life, and damage people’s lung tissues. But ozone also absorbs harmful components of sunlight, known as “ultraviolet B”, or “UV-B”. High above the surface, above even the weather systems, a tenuous layer of ozone gas absorbs UV-B, protecting living things below.
    • ozone hole Each year for the past few decades during the Southern Hemisphere spring, chemical reactions involving chlorine cause ozone in the southern polar region to be destroyed rapidly and severely. This depletion is known as the “ozone hole”.
    • Future adverse impacts from projected global warming extreme heat drought, rising sea levels, and higher-intensity tropical storms risk with our coastal property and resources, questionable livability of our cities in summer, Lower productivity of our farms, forests, and fisheries. Sea level rise Changes in precipitation patterns Changing climate conditions severe stress on forests
    • Melting glaciers
    • 1941 MELTING GLACIERS 2004
    • Changes in precipitation patterns Changes in precipitation patterns could have a significant impact, especially in already water-scarce regions that are likely to suffer from further decreasing rainfall
    • Changing climate conditions The ranges and abundance of plants and animals could change dramatically under changing climate conditions, and some of them are likely to be unable to adapt or migrate to new locations.
    • severe stress on forests Possible severe stress on forests due to rapid and greater warming
    • serious human health impacts, Increasing heat stress, Worsening air pollution, Declining water quality, Spread of infectious diseases
    • Sea level rise Sea level could rise by 3.5 to 34.6 inches between 1990 and 2100, making coastal groundwater saltier, endangering wetlands, and inundating valuable land and coastal communities.
    • Drought
    • Tropical storms
    • Coastal property damage
    • Stress on forest life
    • Scarcity of water
    • Lower productivity of farms
    • Carbon dioxide • Burning of fossil fuels, • cement manufacture, • deforestation and • other land-use changes
    • Carbon dioxide (CO2) is one of those heat-trapping (greenhouse) gases that have increased significantly in atmospheric concentration since pre-industrial times and thus has raised the greatest concern.
    • Methane • Livestock, • wet rice agriculture, • solid waste, • coal mining, • oil & gas production, • biomass burning
    • Nitrous oxide • Nylon production, • nitric acid production, • biomass burning, • cultivated soils, • automobiles with three-way catalysts
    • Chlorofluoro-carbons (CFCs) • Chemical products & processes, including refrigeration, • industrial solvents, • blown-foam insulation
    • Sulphur hexafluoride (SF6) • Chemical products and • Chemical processes
    • Trifluoro- methyl sulphur pentafluoride (SF5CF3) • Unknown • Minimal, but • growing fast
    • Global warming is already under way. The evidence is vast and the urgency of taking action becomes clearer with every new scientific study. Some of the most obvious signs are visible in the Arctic,where rising temperatures and melting ice are dramatically changing the region’s unique landscapes and wildlife—as well as people’s lives and livelihoods.
    • Listen to the cry of mother Earth.
    • NOW THE GLOBAL WARMING SOLUTIONS………………………..
    • The global warming solutions are • Using energy more efficiently • moving to renewable energy (wind, solar, geothermal, and bioenergy) • increasing the efficiency of the cars we drive, • reducing our dependence on oil and other fossil fuels that cause global warming • vehicle technology solutions
    • We can’t avoid all the consequences of global warming, but committing ourselves to action today can help ensure our children and grandchildren inherit a healthy world full of opportunity.
    • Let us spread awareness around to save our planet from further warming and To reduce the existing level of warming.
    • To protect the health and economic well-being of current and future generations, we must reduce our emissions of heat-trapping gases by using the technology, know-how, and practical solutions already at our disposal.
    • WINDMILL USING RENEWABLE SOURCES OF ENERGY
    • POLAR BEAR AT THE MERCY OF HUMANS Save them. Reduce global warming!
    • LET US MAKE A ” COOL EARTH CLUB” IN OUR SCHOOL TO SPREAD AWARENESS REGARDING THE PROBLEM OF GLOBAL WARMING AND ITS SOLUTION.