global warming
TRANSCRIPT
GLOBAL WARMING
Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. This is a type of greenhouse effect.
FACTS ABOUT GLOBAL WARMING
• Emissions like carbon dioxide, nitrous oxide and other greenhouses gases will remain in the atmosphere for many years making impossible to eliminate global warming for several decades.
• Since 1880, the average temperature has risen by 1.4-Fahrenheit degrees• The Arctic is one of the worst places to be effected by global warming.• Humans are emitting more carbon dioxide in the atmosphere, faster than
the absorbing rates of plants and the oceans.• 200o-2009 has been the hottest decade periods of the earth.• Between 2000-2100, the heat related deaths will rise by 150,000.• Droughts, hurricanes, wildfires, extinction on endangered species, melting
of polar ice caps, storms are few of the effects of global warming.
How does Global Warming work?
(a) Earth absorbs most of the sunlight it receives(b) Earth then emits the absorbed light's energy as infrared light (c) greenhouse gases absorb a lot of the infrared light before it can leave our atmosphere(d) being absorbed slows the rate at which energy escapes to space; and (e) the slower passage of energy heats up the atmosphere, water, and ground.
Discovery of global warming
1800-1870Level of co2 measured in ancient ice is 290ppm (parts per million )18 24Fourier calculates that earth would b more colder if it lacked atmosphere 1859Tunstall discovered some gas block infrared radiation 1896Arrhenius publishes first calculation of gw from human emission of co21930Milankovitch propose orbital change as the cause of ice age 1956Ewing and donn offer feedback of quick ice age onset1970First earth day Creation of US national oceanic and atmospheric administration
1981 IBM personal computer introduced1982Strong gw since 1970s reported 1981 was the warmest yr on record 1995Reports detect serious warming likely to be in the coming century2002
Global dimming due to pollution 2003Concern about collapsing ice sheets Rise in the sea level
2004Major books,movie and artwork featuring gw appear2009Experts warn abt gw arriving faster 2012Heat waves,droughts,extremes of precipitation made worse by gw2013Atmosphere is warning and oceans have continued to get rapidly warmer
Causes
• The Co2 concentration increased in atmosphere about 30% due to human activities.
• It is predicted that we’ll soon reach carbon dioxide concentrations that haven’t been seen on Earth in the last 50 million years.
1. Deforestation
• The use of forests for fuel is one cause of deforestation.
• We are chopping forests which is not a good sign and has also leads to de-crease in rainfalls
• deforestation releases large amounts of carbon
2. Methane and Nitrous oxide emissions
• From agriculture, Arctic sea beds and factoriesmethane gas.
• As methane escapes from the Arctic seabed, the rate of global warming increases, accordingly.
• With the increase in the amount of concentrated livestock production, the levels of methane released into the atmos-phere is increasing.
3. Aerosols
They scatter and absorb solar and infra-red radiation.
They may change the micro-physical and chemical properties of clouds and possibly their lifetime and extent
4. Sea level
Increase in sea levels is the result of melting of two massive ice sheets in Antarctica and Greenland as researched by scientists.
Many nations around the world will experience the effects of rising sea levels, which could displace millions of people,
5. Water Vapor
• Water vapor is increasing in the atmosphere due to carbon dioxide-induced warming.
• Two-thirds of the heat trapped by greenhouse gases is contained in water vapor, and as the average temperature on the planet to raises.
6. Fossil Fuels
Each time a fossil fuel burn, carbon dioxide levels in the atmosphere increase.
CO2 absorbs infra-red energy emitted from the earth’s surface, preventing it from returning to space.
7. Population Increase
• As the population on Earth increases, food and housing demands along with other basic necessities also increase.
GLOBAL WARMING A CAUSE FOR HUMAN EXTINCTION???
• No population of a large vertebrate animal in the history of the planet has grown that much, that fast, or with such devastatig consequences to its fellow earthling.
• No population of a large vertebrate animal in the history of the planet has grown that much, that fast, or with such devastating consequences to its fellow earthling.
• No population of a large vertebrate animal in the history of the planet has grown that much, that fast, or with such devastating consequences to its fellow earthling.
• Forty percent of the planet’s land is devoted to human food production, up from 7 percent in 1700.
IMPACT OF GLOBAL
WARMING
POTENTIALWHAT IT IS DOING; AND WHAT IT CAN DO AND AT WHAT SCALE.
SCARY ENOUGH?LETS JUST BE HUMANS(SELFISH)
- AND TALK ABOUT WHAT IT WILL DO TO US FIRST.
• Temperatures will continue to riseACTUAL SUMMERTIME SADNESS
• Changes in precipitation patternsALL YEAR ROUND RAINS?
• More droughts and heat wavesNOT COOL. CANT SEE MORE FARMERS DIE.
• Hurricanes will become stronger and more intenseFLYING HOUSES, MORE FLOODS, AND DESTRUCTION ALL OVER.
• Sea level will rise 1-4 feet by 2100HIGH TIDE ALL TIME? NO MARINE DRIVE? SCUBA DIVING HAJI ALI?
• Arctic likely to become ice-freeNO POLAR BEARS, NO PENGUINS?
One area of particular concern is the Himalayans. 1/3 of the worlds fresh drinking water comes from the run off from this glacier system.
A direct consequence from our polluting actions will be the disappearance of these vital glaciers.
What will happen to those couple billion who depend on this previously reliable water source?
REST OF THE WORLD, 3.2 billion people
will experience water scarcity
400 to 600 will be threatened by hunger generated by global warming
Each year an additional 2 to 7 million people will be victims of coastal flooding
LETS TALK ABOUT INDIAN SUBCONTINENT
It’s impacting every notch of our delicately balanced ecological system, such as Animals( we have no right to melt
down their homes, or cut down their forests)
Viruses( Diseases will spread faster than ever)
Migration habits
279 species of plants and animals have responded to global warming, migrating closer to the poles.
LETS JUST SEE AROUND THE
WORLD
Diseases?They can kill us faster than ever if this doesn’t
stop.
Threat to flora and fauna
Global warming rampage wont spare these innocent beings also. Lets not forget, its
their home equally.
The WWF recently released their expectations, according to their research, a raise of 2-3C will transform 60% of the Amazon forest (home to 2/3 of the worlds plant species) into a arid savanna. The number of problems that will erupt from such an event are endless.
Air Pollution
Health Issues
Plants
Animals
Acid RainEutrophication
Marine Life
Food Supply
Impact on Food Supply
Reduced yields
Increased irrigation
Planting and harvesting changes
Decreased arability
More pests
Risks to fisheries
Economic Impacts
Ecotourism
Lost Productivity
Mass Migration and Security threats
Coping Cost
Damage to property and Infrastructure
Solutions to Global Warming
Environmental Value Systems
Ecocentrism Anthropocentrism Technocentrism
Air PollutionEcocentric Anthropocentrism Technocentrism
• Odd-Even Ban• Green Tax
• Electric Cars• Renewable Energy
Increasing Evaporation
Ecocentric Anthropocentrism Technocentrism
• Water Cuts• Shade Balls• Cloud Seeding
Shade Balls
Burning of Plastic Bottles
Ecocentric Anthropocentrism Technocentrism• Reduce• Reuse• Recycle
• Edible Bottles• Paper Water Bottles
Solutions Implemented by Countries
•Implementing policies
•Green Taxes
•Carbon Credits
The Difference between global warming and
climate change
What Do you picture when I say Global warming
And What do you picture when I saw climate change
According to a research done at Yale university , when people were asked the same question here is what they
replied
So Global warming is a more known phenomenon as 79 % of people know about it
Global warming is perceived as more dangerous and serious
While scientists go with climate change
But causes of both are nearly same
Scientist go with climate change because
It is more accurate concept
It is long term
and a constant thing
while media and politicians prefer global warming due to its emotional appeal
Global warming is increase in earth’s temperature since industrial revolution because of green house emission ,change of land use ,burning of fossil fuels
Climate change is the long term change to whole planets ‘s climate including wind pattern ,snowfall ,rainfall ,humidity etc
climate change is a broader concept
it is much more older concept
Is global warming real ?
According to a new Antarctica has gained so much ice it is over balanced for the ice that the continent has lost .
From 1992 to 2010 continent gained more ice than it lost in melting
112 billion every year
There is more ice now than from 1981 to 2010
The truth behind all these facts
This new research is consistent with global warming data
Increase in ice is infact a outcome of global warming
Ice has only increased in east and part of west Antarctica
But rest of the continent is losing ice
And gaining ice very bad
Why there is increase in the ice
So increase in ice is outcome of global warming and its very bad for earth
Melting glaciers are depositing fresh water into the ocean
Fresh water freezes faster
Salt water has a much lower freezing point
Fresh water has dilutes the salt water around the continent therefore it freezes more
But water underneath the diluted layer is still warming All these are very dangerous for earth Oceans have warmed around 0.18 f in the top 700 meters alone but such a
small change is very dangerous for a big planet like earth
Earth is heating faster then predicted
Freezing winters
Why was America freezing when the glob is warming
Polar vortex was responsible for the freezing temperature in the us and Canada
It is a large pocket of very cold air that sits over polar region
Study claims the recent polar vortex may have been caused by melting polar ice
Warm water melts the ice and this causes warm air to be released
Warm air destabilises polar air sending cold blasts into atmosphere
As global warming continues to heats ocean freezing winters will increase
Bangladesh
1. Bangladesh is situated on river delta 2. This makes it very vulnerable to rising sea level 3. Scientists have predicted 13 mt rise in sea level bordering this poor country 4. But impact of global warming can be seen clearly today too 5. Thousands of people have lost their homes ,agricultural land .they are forced to
migrate 6. Floods have been a constant thing in the area but it has increased and has taken
a dangerous avatar causing massive poverty ,diseases 7. Poverty has led to human trafficking
THANK YOU Aryan Maniyar 51Muzammil Haider 62 Neerali Dodiya 17 Srivardhan 48Uday Jai Kakkar 38Zeel Mehta 57
Lets save this planet together