global warming presentation..

global warming presentation..

• 1.
  Global warming…. Contents covered • Introduction • History • Causes • Effects • Global warming and climate change • Graph • Facts • Why is global warming a concern • Steps to be taken
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  Introduction • Global warmingrefers to the rising average temperature of Earth's atmosphere and oceans, which began to increase in the late 19th century and is projected to continue rising. • The Earth's average surface temperature, expressed as a linear trend, rose by 0.74±0.18 °C over the period 1906–2005. • Currently global warming has lead to a great extent resulting in tremendous changes in the earth.
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  History of earth •Earth formed ~4.6 billion years ago originally very hot • Sun’s energy output only 70% of present • Liquid water present ~4.3 billion years ago • Much of the earth’s early history erased during late heavy bombardment (~3.9 billion years ago )
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  • Deforestation • Greenhouse gasses • Chloro - fluoro carbons • Combustion of fossil fuels
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  Major Cause Air pollution • Excessive Use Of Automobiles • Hazardous Industrial Gases • Thermal Power Plants • Smoke And Fumes
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  Effects of globalwarming • Melting ice : melting ice caps will throw the global ecosystem out of balance. • Flooding :represents one of the most dangerous hazards to human settlements and is one of the most potentially momentous impacts of global warming. • Hurricane :ocean temperature is a key factor for hurricane formation • Smog :A powerful combination of vehicular fumes, ground-level ozone, airborne industries.
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  Other effects of globalwarming
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  Energy utilization 18% 11% 9% 5% 3% 11% 4% 39% Fridge TV Fan Computer AC Heater/Geyser Appliances Light
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  Facts • Without theatmosphere to create a greenhouse- type effect, the average temperature on Earth would be just 5° Fahrenheit (F).g • According to NASA studies, average temperatures around the world have increased 1.4° F since 1880, with most of the change occurring in recent decades.f • As Arctic ice rapidly disappears, scientists believe the Arctic will experience its first ice-free summer as early as the year 2040.f • Between the years 1961 and 1997, the world’s glaciers lost 890 cubic miles of ice.b
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  Facts • Fossil fuelburning currently adds nearly six billion tons of CO2 to the atmosphere every year. Only half of this CO2 is removed by forests and oceans.e • Cars amount to three-quarters of all transportation emissions. At the current rate, the world will be driven on by more than a billion cars in 2030 and a billion more by 2050.g • Scientists estimate that just 20,000 to 25,000 polar bears still survive in the wild.g • The earth’s atmosphere now contains 40% more CO2 than before the Industrial Revolution.g
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  Why is globalwarming a concern ? • The Rapid Rise In Greenhouse Gases Is A Problem Because It Is Changing The Climate Faster Than Some Living Things May Be Able To Adapt. • historically, earth’s climate has regularly shifted Back And Forth Between Temperatures Like Those We See Today .. • Now, With Concentrations Of Greenhouse Gases Rising, earth’s remaining ice sheets (such as greenland and Antarctica) • As The Mercury Rises, The Climate Can Change In Unexpected Ways.
• 14.
  Steps to betaken • Clean or replace filters on your furnace and air conditioner • Choose energy efficient appliances when making new purchase • Do not leave appliances on standby • Get a home energy audit • Use less hot water • Recycle your organic waste • Reuse your shopping bag • Reduce waste •
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  Steps to betaken • Buy organic foods as much as possible • Drive carefully and do not waste fuel • Protect and conserve forest worldwide • Encourage the switch to renewable energy • When it is time for a new car, choose a more fuel efficient vehicle • Try creating awareness among your society. • Plant a tree
• 16.
  Thank you • Ankita popli 118 • Uday powar 119 • Prajapati sawan 120 • Aamod pulekar 121 • Ketan puranik 122 • Lloyd quadras 123 • Ajay raigawali 124 • Titiksha rajput 125 • Pooja rakheja 126