1 / 22

INTRODUCTION

INTRODUCTION. Global warming is caused by green house gases, which trap in the sun’s infrared rays in the earth’s atmosphere, which in turn heat up the earth’s atmosphere. These green house effect warming is called as global warming. .

elpida
Download Presentation

INTRODUCTION

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. INTRODUCTION Global warming is caused by green house gases, which trap in the sun’s infrared rays in the earth’s atmosphere, which in turn heat up the earth’s atmosphere. These green house effect warming is called as global warming.

  2. The global warming has happened in the past few years and is evident from the rise in mean temperature of the earth’s atmosphere

  3. The global warming has led to increase in mean earth surface temperature and thus melting of polar ice

  4. There are frequent melt down of glaciers that result in floods and other natural calamities. The melting of ice at the poles had led the mean sea level. And further increase in temperature may further melt the ice and lead to further increase in mean sea level, which will engulf low lying countries

  5. EFFECTS OF GLOBAL WARMING

  6. The effect of global warming is very evident on the animal kingdom also. Some animals have become extinct due to loss of their natural habitat or their inability to evolve to the rapid changes in the climate

  7. Also there is a change in their life style because of the changes in the seasons. The migrating birds have changed their time of travel and also their place of migration.

  8. The global warming is also responsible for the Introduction of some new diseases. The bacteria are more effective and multiply much faster in warmer temperatures compared to cold temperatures. The Increase in temperature has led to increase in the microbes that cause diseases.

  9. Global warming is also effecting the crop production, as the crops are getting destroyed by the sudden change in temperatures or sudden on set of rains.  Also the flash floods and other natural calamities affect the crop. As a matter of fact, because of global warming, the earth’s atmosphere is getting more unpredictable with heavy rains in the areas, which have scanty rainfall or drought in the areas, which received good annual rainfall. The months of rainfall has also getting affected.

  10. But there are some people on the other side of the wall also, they believe that the global warming is a natural process and cannot disturb our ecosystem. The earth’s surface mean temperature was even higher a long time ago, and the ecosystem has evolved from that temperature to this. So it can evolve further. But the changes that are happening now are rather fast compared to earlier times.

  11. CAUSES OF GLOBAL WARMING

  12. Global Warming is increasing the earth’s average temperature. The Green house gases are the main culprits of the global warming. The green house gases like carbon dioxide, methane, and nitrous oxide are playing hazards in the present times. These green house gases trap heat in earth’s atmosphere and thus result in Increasing the temperature of earth. The excessive emission of these gases is the major cause of global warming.

  13. The major source of carbon dioxide is the power plants. These power plants emit large amounts of carbon dioxide produced from burning of fossil fuels for the purpose of electricity generation. Coal is the major fuel that is burnt in these power plants.

  14. Buildings, both commercial and residential represent a larger source of global warming pollution than cars and trucks. Building of these structures require a lot of fuel to be burnt which emits a large amount of carbon dioxide in the atmosphere.

  15. The second major greenhouse gas after carbon dioxide, which causes global warming, is Methane.  Methane is more than 20 times as effectual as CO2 at entrapping heat in the atmosphere. Methane is obtained from resources such as rice paddies, bovine flatulence, bacteria in bogs and fossil fuel manufacture

  16. Another major cause of global warming is deforestation. Deforestation is to be blamed for 25% of all carbon dioxide release entering the atmosphere, by the cutting and burning of about 34 million acres of trees each year

  17. Trees collect the CO2 that we breathe out and give away from various other sources, and they give back oxygen that we breathe in. Thus, cutting of trees is leading to greater concentration of carbon dioxide in the atmosphere. So STOP CUTTING, START PLANTING. Greater urbanization, requirement of land for factories and buildings, requirement of timber are all reasons that are leading to deforestation, which in turn is leading to global warming.

  18. PREVENTIONS FOR GLOBAL WARMING • Plant a tree. • Keep your car tuned up, and • check tire pressure often • to save gas. • Clean or replace your filters monthly • Decrease your air travel.

  19. “REUSE THE PAST, RECYCLE THE PRESENT AND SAVE THE FUTURE. STOP GLOBAL WARMING OR IT WILL KILL U”

  20. PRESENTATION BY RAMYA MANASA

  21. THANK YOU

More Related