Climate change

• Evidence of global warming:

  1. Thermometer readings
  2. Glacier retreat
  3. Ice cores
  4. Rising sea levels
• Thermometer readings - shown a clear warming of the Earth's temperature over the past few decades
• Glacier retreat - photographic evidence has shown that the world's glaciers have been melting
• Ice cores - Scientists use ice cores to detect changes in temperatures
• High pressure - diverging air

  Low pressure - converging air ^
• Natural factors increasing global warming:

  • orbital changes
  • volcanic activity
  • solar output