Greenhouse effect

• What is the enhanced greenhouse effect?

  Human influence on greenhouse gases
• How does the enhanced greenhouse effect impact the Earth?

  It makes the Earth even warmer
• What are examples of greenhouse gases?

  • Carbon dioxide
  • Methane
  • Nitrous oxide
  • CFCs
• What happens to some greenhouse gases in the atmosphere?

  Some pass through, others are re-absorbed
• What is the effect of infrared radiation emitted from Earth's surface?

  It warms the Earth's surface and lower atmosphere
• What are natural sources of carbon dioxide?

  Plants and animals
• What human activities contribute to carbon dioxide emissions?

  Deforestation, burning fossil fuels, industries
• What are the main sources of methane emissions?

  Raising livestock and coal gas production
• How does nitrous oxide enter the atmosphere?

  Through agriculture and industrial activity
• What are CFCs used for?

  In aerosol products like deodorants
• How does transport contribute to the greenhouse effect?

  • Increase in shipping
  • More CO2 produced
  • More people using transport
• What is deforestation?

  Large-scale cutting down of trees
• How does deforestation affect CO2 levels?

  It increases CO2 levels, trapping more heat
• What happens when trees are cut down?

  They release stored CO2 into the atmosphere
• How does livestock farming contribute to greenhouse gas emissions?

  • More land needed for livestock
  • Increased CO2 emissions
  • Population growth drives demand
• How does energy production contribute to greenhouse gases?

  Burning fuels releases greenhouse gases
• What is the relationship between greenhouse gases and energy from the sun?

  Greenhouse gases trap more energy from the sun
• What happens to outgoing radiation from the Earth?

  It is trapped beneath the Earth's surface
• What are the natural greenhouse gases?

  • Carbon dioxide
  • Methane
  • Nitrous oxide
  • Water vapor