The document discusses the greenhouse effect and the gases that cause it. It explains that greenhouse gases like carbon dioxide and methane in the atmosphere trap infrared radiation reflected from the Earth's surface, preventing it from escaping into space and warming the planet. These gases are emitted through processes like burning fossil fuels, agriculture like rice cultivation and livestock grazing, and decay from landfills. The greenhouse effect is what determines the surface temperatures of planets like Earth and Venus by modifying the radiative equilibrium through their atmospheric compositions.

2. Kerala University College Of
Teacher Education
Nedumangadu

3. Presented by
Suramya.B
Reg.No: 13983033
Option: Social Science

4. Greenhouse Effect

6. The gases like carbondioxide and
methane and water vapour found in the
atmosphere play an important role in
regulating the temperature. These are
the greenhouse gases

7. Radiation from the sun passes
through the atmosphere reaches the
earth surface and the infrared rays
are reflected back into space

9. Greenhouse gases
 Carbondioxide(co2)
-source: fossil fuel burning, deforestation
 Methane(CH4)
-source: rice cultivation, cattle and sheep raching
,decay from landfills
 Nitrous oxide(N2o)
Source: Industry and Agriculture (fertilizers)

10.  Radiative equilibrium works for mercury and just about
for mars
 The disagreements for Venus and the earth is because
these two planets have atmosphere containing certain
gases which modify their surface temperatures
 This is the greenhouse effect in action
 The existence of the greenhouse effect is universally
accepted and it links the composition of a planet’s
atmosphere to its surface temperature

11. Thanks