Greenhouse Effect & Global Warming:

Evidence for Global Warming:

The average global temperature has risen about 0.50C in the last century, and scientists expect another increase of 1 to 40C in the next 100 years due to increasing pollution in our atmosphere.

Greenhouse Effect:

  • Greenhouse gases allow the passage of incoming solar short-wavelength radiation but absorb some of the reflected infrared radiation and reradiate it back to the Earth’s surface.

  • Energy is then reradiated in the lower atmosphere causing an increase in temperature and climatic change. Hence, contributing to global warming.

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Greenhouse Gases:

  1. Water (H2O)
  2. Carbon dioxide (CO2)
  3. Methane (CH4)
  4. Nitrous oxide (N2O)
  5. CFCs
  6. Ozone (O3)

Greenhouse Gas Sources:

Greenhouse Gas Effects:

Greenhouse gas effects depend on both their concentration (abundance) in the atmosphere and on their ability to absorb heat radiation.

However, each molecule has its own type of bond, they each absorb at slightly different frequencies ...

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