global warming-a gretest environmental threat

8/4/2019 Global Warming-A Gretest Environmental Threat

1/21

Global Warming

The Greatest Environmental

Threat !!!

Global Warming The Greatest EnvironmentalThreat !!!


2/21

Outline

What is Global warming

The Causes

The Effects

How Can We Stop Global

Warming?

Need For Controlling GlobalWarming

Conclusion


3/21

What is global warming?

Rise in earths

temperature

Caused by too much

carbon dioxide

Results from changes in

the natural environment


4/21

What causes global warming?-The Green house Effect

Green House Gases-Gases composed of molecules that absorb and

radiate infrared radiation from the sun.

Eg

. Carbon dioxide(burning fossil fuels, deforestation)

CFCs(Chlorofluorocarbons)-(refrigerants, aerosols,propellants, solvents)

Methane-(animal waste,biomass burning ,fossil fuels,livestock,rice paddles,sewage)

Nitrous Oxide-(biomass burning, deforestation,burning fossilfuels,microbial activity on fertilizers)


5/21

What causes global warming?-

The Green house Effect

Greenhouse gases(e.g. carbon dioxide, methane, nitrous oxide, CFCs)

trap heat in the earths atmosphere.

Solar energy passesthrough

Radiantheat is trapped

Greenhouse gases inatmosphere

Greenhousegases in

atmosphereSome radiationsescape theatmosphere


6/21

The Suns energy

passes through the

cars windshield.

This energy (heat)

is trapped inside

the car and cannot

pass back through

the windshield,

causing the inside

of the car to warm

up.

Example of the

Greenhouse Effect


7/21

CO2: The Most Significant

Greenhouse Pollutant

Burning carbon-containing fossilfuels produces carbon dioxide


8/21

Effects of Global Warming

Increased Occurrence OfTsunamis

Intense Cold Waves

Increased Occurrence OfVolcanic Activity


9/21


Increased Outbreaks OfDeadly Diseases

Deaths by Smog

Loss Of Bio diversity AndAnimal Extinction


10/21


Diminished Food AndWater Supplies

Desertification

Death Of Ocean Life


11/21

How Can We Stop Global

Warming?

Conserve EnergyConsume Energy EfficientlyUse Renewable EnergyStrict Legislative Acts


12/21

Steps To Conserve EnergyWalk, bike, ride public transit,

or carpool

Make sure your tires are fully inflated and

your car tuned up

Lower your water heater thermostat

Don't preheat your oven

Unplug appliances not in use

Turn off lights when leaving a room

Use recycled paper

Reuse or recycle as much as you can


13/21

Steps To Consume Energy

Efficiently

Replace incandescent lightswith fluorescents

Replace your appliances withenergy star ratedappliances

Buy a hybrid car/high mileage

cars

Reduce your homes heatand energy loses


14/21

Renewable Sources Of Energy

Wind

Solar

Hydro electric

Geothermal

Biofuels


15/21

Strict Legislative Acts

Strict Laws need to be enacted toreduce pollution by the individualsor the industrial houses.Pollution due to vehicular trafficneeds to be stictly controlledViolators should be firmly dealtwith


16/21

The Japan Tsunami and

Earthquake-2011

Stop Global Warming!!

Avoid Natural Disasters!!


17/21

If nothing is done to slow

greenhouse gas

emissions. . .

CO2 concentrationswill likely be more than

700 ppm by 2100

Global averagetemperatures projected

to increase between

2.5 - 10.4F

2100

Source: OSTP

Why Global Warming Needs To

Be Controlled?


18/21

What can happen if we dont

produce less CO2?

Temperatures will get warmer.

Glaciers will melt, ice sheets inArtic will melt (Polar Bears hunt

on ice sheets)Sea levels will rise.

More droughts in dry areas and

more rain and snow in wet areas.More violent weather around the

world.


19/21

Conclusion

Global Warming Needs to be

controlled at the earliest to

avoid Natural Calamities.Sincere Efforts are required at

the earliest to make this earth

more safe and healthy placeto live in !!!


20/21

References

www.environmentalgraffiti.com/...effects...global-warming/27

photosoftsunamiinjapan.blogspot.com/201

www.nmsea.org/.../Global_Warming/fossil_fuels_and_global_warming.htm

www.scostep.ucar.edu/comics/books/glob

warm_e.pdf www.globalwarming.org.in/


21/21

global warming-a gretest environmental threat

Documents