Environment

GLOBAL WARMING

The greenhouse effect...

• By humans
• Caused by combustion of fossil fuels
• They produce CO2
• CO2 makes a barrier in the atmosphere
• Heat from the sun can get through but not back out.
• Temperature rises

Natural Climate change...

• Result of natural changes
  
• Warmest periods were before humans started to produce carbon footprints
• If the greenhouse effect was true the top layer of the atmosphere should be heating up faster than the earths surface but it isn't

Solar Activity

• Earths temperature caused by radiation from the sun
• When solar activity is high fewer…