Global Warming

• 4 Greenhouse Gases:

  Carbon Dioxide

  Methane

  Nitrous Oxide

  CFC's (Chlorofluorocarbons)
• [Global Warming]

  • The Heat Energy that ISN'T absorbed by the Earth Surface, is REFLECTED back into the Atmosphere
  • SOME of it is reflected back into Space, but MOST of it hits the Greenhouse Gases in our Atmosphere, which ABSORB all of the energy

  ---> After a while, these Greenhouse Gases RE-EMIT this energy in random directions as Heat, WARMING up the Earth in the process

  A) Absorbed

  
• By increasing the amounts of Greenhouse Gases (like CO2) in the Atmosphere, we're increasing the levels of Gases in the Atmosphere that can Absorb and Re-emit Heat, contributing to MORE Global Warming

  A) Sun

  B) Methane

  C) heat

  
• [Contribution to Global Warming]

  CARBON DIOXIDE (CO2):

  • Human Activity, like Car Exhausts and Burning Fossil Fuels, release LARGE amounts of Carbon Dioxide into the atmosphere
  • Cutting down large areas of Forest (Deforestation) for Timber and Farming, INCREASES the level of CO2 in the atmosphere, contributing to Global Warming

  
• [Contribution to Global Warming]

  METHANE (CH4):

  • Methane is produced naturally from various sources, like Rotting Plants in Marshlands
  • Two MAN-MADE sources of Methane are: Rice Growing and Cattle Rearing (Cows farting and burping)

  A) Cattle Rearing

  
• [Contribution to Global Warming]

  NITROUS OXIDE (N2O):

  • Nitrous Oxide is produced naturally by BACTERIA in the Soil, and the Ocean

  ---> A LOT MORE is released from soils after FERTILISERS are used

  • Nitrous Oxide is also released from Vehicle Engines and Industry

  A) Bacteria

  
• [Contribution to Global Warming]

  CFC'S:

  • CFC's are MAN-MADE chemicals that were once used in Aerosol Sprays and Fridges
  • They damage the Earth's OZONE LAYER that prevents any UV Radiation from reaching the Earth
  • SOME CFC's remain and get released, like Leaks from OLD FRIDGES

  A) fridges