The document discusses the greenhouse effect and global warming. It explains that greenhouse gases like carbon dioxide absorb and re-emit infrared radiation, trapping heat in the lower atmosphere and warming the planet's surface. Examples are given of how the greenhouse effect occurs in structures like greenhouses. Suggestions are provided for reducing greenhouse gas emissions through greener technologies, reducing automobile emissions, preventing deforestation, and using more sustainable refrigerants. The impacts of global warming include rising sea levels, stronger storms and hurricanes, droughts, wildfires, and threats to biodiversity.

12. The Antarctic Ozone
Hole

14. The Ozone hole as
seen from the Earth

18. ChloroFluoroCarbons

23. The greenhouse effect is the process in which
greenhouse gases absorbs radiation (the infra
red rays) and re- radiates it in all directions.
Since part of this re-radiation is back towards
the surface and the lower atmosphere, it results
in an elevation of the average surface
temperature above what it would be in the
absence of the gases.

28. CO2
CO2
CO2
CO2
CO2
CO2
CO2
CO2
CO2
CO2
co2
CO2

29. A greenhouse is a structural building with
different types of covering materials, such as
a glass or plastic roof and frequently glass or
plastic walls; it heats up because incoming
visible sunshine is absorbed inside the
structure. Air warmed by the heat from
warmed interior surfaces is retained in the
building by the roof and wall; the air that is
warmed near the ground is prevented
from rising indefinitely and flowing away.
This process in which the heat is trapped
within the greenhouse can be compared to
the way in which the heat radiations are
trapped in the earth’s atmosphere.

30. Green house effect is something that cannot be
prevented but can
be reduced. It can be reduced in the following
ways:
1. By opting for greener technologies that are
eco-friendly.
2. By reducing emissions from automobiles,
the greenhouse gases can be reduced.
3. By preventing deforestation, because plants
absorb a great amount of CO2 from the
atmosphere.
4. By using CFC-free refrigerators.

31. Global warming refers to an
unequivocal and continuing rise in the
average temperature of Earth's
climate system. Most of global
warming is being caused by
increasing concentrations of
greenhouse gases produced by
human activities. Future climate
change and associated impacts
caused by global warming will vary
from region to region around the

32. • Increase in spread of disease.
• Warmer waters and more hurricanes.
• Increase in droughts and heat waves.
• Economic consequences.
• Melting of polar ice caps.
• Floods.
• Fires and wildfires.
• Storms.
• Death by smog.
• Desertification.
• Tsunamis.
• Cold waves.
• Increase in volcanic activities.
• Loss of biodiversity and animal extinction.

33. Melting and breaking down of
polar ice caps.

34. Artist’s illusion of New York city
underwater.

35. Artist’s illusion of backwards
evolution in case of polar bears.

36. WORLD OZONE DAY
• In 1994, the United Nations General
Assembly voted to designate September
16 as "World Ozone Day", to
commemorate the signing of the
Montreal Protocol on that date in 1987.