global warming presentation
TRANSCRIPT
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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 warming refers 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
• Green house gasses
• Chloro - fluoro carbons
• Combustion of fossil fuels
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Major CauseAir pollution
• Excessive Use Of Automobiles
• Hazardous Industrial Gases
• Thermal Power Plants
• Smoke And Fumes
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Effects of global warming • 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
global warming
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11%
9%
11%
4%
39%
3%5%
18%
Fridge TV Fan Computer AC Heater/Geyser Appliances Light
Energy utilization
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Facts • Without the atmosphere 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 fuel burning 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 global warming 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.
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Steps to be taken
• 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 be taken
• 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
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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