Environmental-Global warming & Ozone layer depletion

• How do the sun's rays reach earth?

  Visible light- passes through the atmosphere and reaches the earth

  Infra-red radiation- enters the atmosphere reaches the earth and radiates back into space

  Ultra-violet radiation- Is meant to be blocked by the ozone layer. found in the atmosphere.
• What is global warming?

  Global warming refers to the long-term increase in Earth's average temperature due to an increased use of fossil fuels which cause the greenhouse effect.
• what is climate change?

  The long-term alteration of temperature and typical weather patterns in a place.
• what is the natural greenhouse effect and the human enhanced greenhouse effect?

  Natural greenhouse effect: trapping of heat by Earth's atmosphere due to naturally occurring greenhouse gases. Human-enhanced greenhouse effect: intensification of the natural greenhouse effect by human activities, such as burning fossil fuels and deforestation, leading to increased levels of greenhouse gases in the atmosphere. This leads to global warming
• Which are the greenhouse gases?

  Carbon dioxide, methane, nitrous oxide, water vapor, and CFCs
• What is the effect of global warming on the earth?

  Melting of ice-caps

  Sea level rises

  Flooding occurs

  Small islands disappear

  Tourism on small islands effected

  Diseases spread

  Desserts expand

  Freshwater sources decrease

  Increase in storms
• what can be done to reduce the effects of global warming?

  Afforestation

  reduce, recycle, reuse

  walk often

  use public transport

  use the bicycle

  practice carpooling
• What is the ozone layer?

  A layer of ozone gas in the Earth's atmosphere that absorbs most of the Sun's ultraviolet radiation.
• How is ozone layer depletion caused?

  Chlorofluorocarbons (CFCs) emit chlorine which binds with ozone and causes a thinning of the layer.
• what are the effects of the ozone on the earth?

  Skin cancer

  Destroys crops

  causes eye cataracts