

INDEX

  What is Global Warming?

 Introduction.

Green House Effect.

  Effects of CO2.

Effects of other Gases.

 Impacts.

 Findings.

 What we can do to stop Global Warming?

Solutions.

Group Members

KETAKI BHALERAO …...…………………………………………………………………..

13

MINI MENON…………………………………………………………………………………52 ANAND BHARADIA………………………………………………………………………….39 ABHIJEET……………………………………………………………………………………...

11

HEMANGI AGNIHOTRI……………………………………………………………………....65 GOVIND NIKAM………………………………………………………………………………70 SANTU MONDAL……………………………………………………………………………..08

What is Global Warming?

 Global warming refers to an average increase in the Earth's temperature, which in turn causes changes in climate. When scientists talk about the issue of climate change, their concern is about global warming caused by human activities. , in particular the burning of fossil fuels and the resulting buildup of greenhouse gases in the atmosphere, have influenced this warming trend.

Natural Green House Effect

 Sunlight (shortwave radiation) passes easily through the earth's atmosphere. Once it strikes and warms the earth's surface, lnfrared radiation is given off and goes back into the atmosphere. While some of this Infrared radiation or heat escapes into space, most of it is absorbed or held by carbon dioxide and other green gases like water vapor , carbon dioxide , methane , nitrous oxide , and ozone that exist in small quantities in the atmosphere.  These gases form a `blanket' that keeps the earth an average of 33 degrees centigrade warmer.

 Without these gases the whole planet would be an icy wasteland with an average temperature of 16 degrees centigrade below freezing

The Greenhouse Effect

Increase in carbon dioxide cause the earth to get warmer

 CO2 contributes about 50% to the greenhouse effect  Carbon dioxide is produced from burning wood, coal, gas, etc.

 The increase in carbon dioxide in the atmosphere is increasing the heat being absorbed from the earth.

 This trapped heat increases the evaporation of water from the oceans into the air to cause a greater increase in warming of the atmosphere.

CO2 has a forcing effect on climate.

Effects of other gases

 Methane is emitted during the production and transport of coal, natural gas, and oil. decomposition of organic wastes in municipal solid waste landfills and the raising of livestock.  Nitrous oxide is emitted during agricultural and industrial activities, as well as during combustion of solid waste and fossil fuels.  Very powerful greenhouse gases that are not naturally occurring include hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6), which are generated in a variety of industrial processes .

The Earth's rising temperatures are chiefly the result of the burning of fossil fuels (which puts carbon dioxide a heat-trapping or greenhouse gas in the atmosphere). Scientists, however, do not currently agree that human-caused global warming is a significant problem

Impacts of Global Warming

?

 The climate system varies through natural, internal processes and in response to variations in external forcing factors including solar activity, volcanic emissions, variations in the earth's orbit (orbital forcing) and greenhouse gases.  The detailed causes of the recent warming remain an active field of research, but the scientific consensus identifies increased levels of greenhouse gases due to human activity as the main influence. This attribution is clearest for the most recent 50 years, for which the most detailed data are available.  Contrasting with the scientific consensus, other hypotheses have been proposed to explain most of the observed increase in global temperatures. One such hypothesis is that the warming is caused by natural fluctuations in the climate or that warming is mainly a result of variations in solar radiation.

 None of the effects of forcing are instantaneous. Due to the thermal inertia of the Earth's oceans and slow responses of other indirect effects, the Earth's current climate is not in equilibrium with the forcing imposed. Climate commitment studies indicate that even if greenhouse gases were stabilized at present day levels, a further warming of about 0.5

° C (0.9

° F) would still occur



Millions at Risk of Hunger and Water Stress in Asia Unless Global Greenhouse Emissions Cut

Climate Change Hits Hard on Latin America and the Caribbean.

Polar bear "walking on thin ice" across the Arctic in order to reach marine seal hunting grounds.

Algae fills a pool fed by Canada Glacier in the Dry Valleys region of Antarctica with some experts forecasting the melting of half the Arctic’s summer sea ice by the century’s end.

The Arctic is heating up at least twice as fast as the rest of the planet, according to the final report of the Arctic Climate Impact Assessment

The Esperanza surrounded by small ice floats in the Ross Sea, Southern Ocean Whale Sanctuary

Findings of IPCC

 The United Nations formed a group of scientists called the INTERNATIONAL PANEL ON CLIMATE CHANGE OR IPCC.

 The IPCC was established in 1988 to study climate change information.

 The group doesn’t do independent research but instead reviews scientific literature from around the world.

 The group’s goal is to produce “a balanced reporting of existing viewpoints” on the causes of global warming.

 The IPCC meets every few years to review the latest scientific findings and write a report summarizing all that is known about global warming.

Some of the findings are as under



The 1990’s was the warmest decade, and 1998 the warmest year on global record.



The burning of coal, oil & gas has increased the amount of CO2 in the atmosphere by 30% over natural levels



The Earth is warming faster than at any time in the past 10,000 years

What we can do, to stop GLOBAL WARMING?

           Use the washing machine or dishwasher only when they are full Take a shower instead of a bath Use less hot water Be sure you’re recycling at home Reuse your shopping bag Plant a tree Buy locally grown and produced foods Buy fresh foods instead of frozen Seek out and support local farmers markets Buy organic foods as much as possible Eat less meat

       

What we can do, to stop GLOBAL WARMING?

Reduce the number of miles you drive by walking, biking, carpooling or taking mass transit wherever possible    Keep your car tuned up Drive carefully and do not waste fuel When it is time for a new car, choose a more fuel efficient vehicle Try car sharing    Try telecommuting from home Fly less Encourage your school or business to reduce emissions Join the virtual march Encourage the switch to renewable energy Protect and conserve forest worldwide Consider the impact of your investments Make your city cool Tell Congress to act Make sure your voice is heard!

Solution for Global Warming?

 We have the technology and ingenuity to reduce the threat of global warming today.

Solutions are already available that will stimulate various economy for different countries by creating jobs, saving consumers money, and protecting our national security. By investing in renewable energy and energy efficiency, and increasing the efficiency of the cars we drive, we can take essential steps toward reducing our dependence on oil and other fossil fuels that cause global warming.

 Using energy more efficiently and moving to renewable energy (wind, solar, geothermal, and bio energy) would significantly reduce our emissions of heat-trapping gases. The United States currently produces 70 percent of its electricity from fossil fuels such as coal, natural gas, and oil, but only two percent from renewable sources. Since the burning of fossil fuels releases large amounts of carbon dioxide—the leading cause of global warming—but renewable energy does not, increasing the share of our electricity generated from renewable resources is one of the most effective ways to reduce global warming emissions.

 By putting energy efficiency, renewable energy, and vehicle technology solutions in place at the federal level, we can reduce our contribution to global warming while creating a stronger, healthier, and more secure WORLD.

Individual



What difference can I make ?

When faced with this question, individuals should recognize that collectively they can make a difference  Recycling newspapers, plastics, glass and metal will help a lot.

Industry Actions

 Industry can take a leading role in focusing serious attention on global warming  Everyone knows that reducing waste is good for the environment. What most people don’t know is that solid waste reduction and recycling help address global climate change. How? By decreasing the amount of heat-trapping greenhouse gases that are linked to everyday trash.

International

 Climate change is a global problem requiring action from the entire international community. Countries from around the world are working together to share technologies, experience, resources and talent to lower net greenhouse gas emissions and reduce the threat of global climate change.  One important strategy for reducing global greenhouse gas emissions is developing and sharing climate-friendly technologies.

At last, we have to diffuse the bomb of

“

GLOBAL WARMING

”

Spread the word! Tell other people things that they can do to help prevent global warming.

- Remember -- Every person makes a difference!