The presentation discusses the concepts of greenhouse effect, climate change, and global warming, highlighting their distinct processes and causes, including human activities like burning fossil fuels and deforestation. It outlines the mechanisms by which the Earth's atmosphere traps heat, leading to rising temperatures, changing weather patterns, and potential remedies to mitigate these effects. It emphasizes the urgent need for alternative energy sources and actions to reduce greenhouse gas emissions.

1. Presentation

2. Group Members
1. Mir Atikur Rahman 09106063
2. Nur Islam 08306014
3. Faia Jahan 10106062
4. Md Hachnayen Ahmed 10106063

4.  The terms “Greenhouse Effect”, “Climate Change”, and
“Global Warming” are often used interchangeably, yet
they really refer to three separate and distinct
processes. In this presentation we will show how the
world environment/ weather getting warmer.
 Gases responsible for green house effect.
 Its effect and possible remedy.

5.  Firstly let’s look at how the earth atmosphere is heated.
 The energy that heats the atmosphere comes from the Sun
, which is the source of huge energy
 The sun sends its solar radiation out into space and the
earth intercepts only a small portion of it, about one part in
two billion which is tremendous amount.
 ½ of that energy that reaches the earth's atmosphere is
reflected back out into space and about ½ reaches the
surface.
 Once the sun's energy reaches the earth's surface, it is
absorbed and the temperature of the earth’s surface
increases.

6.  The ability of the earth's atmosphere to allow the
passage of visible light, but absorb reradiated heat
energy emitted from the earth's surface is known as
the greenhouse effect.
 Climate is the long-term average conditions of
weather.
 Global warming refers to a rise of a temperature of the
surface of the earth.
 Currently the total world’s population is approx.
6,973,738,433

7.  The earth was formed  Earliest human was born
about 4.5 billion years ago. about 4.1 million ago
 At that time the earth  The population was
contained about 1% oxygen doubled from 3 billion to 6
pressure billion from the year of
 The Plants were developed 1959 to 1999
first about 2.7 billion years
ago
 The first animal was
develop around 600
millions year ago

9.  Slowly, the ability of the earth’s atmosphere to absorb
heat from the surface has increased and, with it, the
temperature of the atmosphere. This is known as
global warming.

10.  Increase in the amount of greenhouse gasses in the
atmosphere attributed mainly to human activity. Which is
caused an unbalanced in the process called the green house
effect.
 Burning fossil fuels
 Cutting down trees
 Burning forest
 Factories Pollulaion
 Coal
 Oil
 Natural Gases
 Rising Sea levels

13.  Climate change refers to general shifts in climate,
including temperature, precipitation, winds, and other
factors.
 Factors are sun’s output, changes in the earth’s orbit
and tilt, and volcanic activity etc.

14.  Human Causes
 Increase green house gasses(emulsion from buning
fossils fuels-oil, coal etc)
 Pollution, smog from factories.
 Deforestation
 Increasing Population (More people more CO2)

15.  Natural Causes
 The arctic tundra and wetlands release methene, a
greenhouse gas
 Earth naturally has a cycle of climate change that
occurs every 40,000 years
 The sun’s solar energy output is changing and
naturally increases Earth average temperature by
about 1’C every century
 Earth’s orbit and tilt alter in relation to the sun, which
changes solar energy output.

19.  An average increase in temperature and during the last
century
 Melting of polar ice-polar bears and others animals are
drowning
 Migrating birds are forced to change their time and
place of migration
 Melting of glaciers will lead to higher sea level, which
will cause floods and put many low elevation reginons
at risk of disappearing under water
 Longer summers can disrupt animal habitaion

20.  New and widespread diseases because of warm climate
 Damaged crops due to sudden climate change and
floods
 Average Precipitation increase around the world
 More wildfires
 Droughts, heat waves, extreme winter and stroms,
hurricanes, typhoons

21.  A glass building in which palnts are kept to protect
then from cold weather is known as green house.
 And the trapping of the sun’s warmth in the earth’s
lowest atmosphere , because visible radiation from the
sun passes through the atmosphere more radily

24.  Carbon Dioxide from Fossil fuel Combustion: (82%)
Carbon Dioxide emitted from Cars, Trains.
 Methane: (9%) methane, comes form landfills, coils,
oil and gas operations and agriculture
 Nitrous Oxide: (5%) Emitted from burning fossils fuels
and through the use of certain fertilizers and
industrial processes
 Human Made gases: (2%) Released as byproducts of
industrial processes and through leakage.

25.  Rising concentration of greenhouse gases generally
produce an increase in the average temperature of the
Earth
 Rising temperature may , in turn , produce changes in
weather, sea levels and land use patterns, commonly
referred to as “climate Change”

30.  Stop fossils fuels  Use clean coal and oil
 Stop factories pollution  Drive low emission and
 Which will cause lack of fuel efficiency vehicle
oxygen  Plant trees
 Reduce Waste
 Use solar power energy

31.  Sijnce stopping the burning of fossil fuels would have t
great of a negative effect on our economy
 We must investigate other forms dof energy that
would be just as affordable as fossil fuels without the
negative effects or harmful gasses that contribut to
global warming. (Solar , Wind)