Human causes of climate change

• Carbon dioxide

  • Carbon dioxide accounts for an estimated 60% of the enhanced greenhouse gas effect.
  • Global concentration have increased by 30% since 1850.
• How is carbon dioxide produced?

  • Burning fossil fuels (eg. Oil, gas and coal ) in indust and energy production.
  • From car exhausts.
  • Deforestation and the burning of wood.
• Methane

  • Methane is very effective in absorbing heat.
  • It accounts for 20% of the enhanced greenhouse effect.
• How is methane produced?

  • Decaying organic matter in landfill sites.
  • Rice farming
  • Burning of biomass for energy
  • Farm livestock