Global Warming – Climate Change



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Global Warming – Climate Change

  • What do I need to know?
  • What do I need to do?

Key Questions- ?????

  • Is the earth’s atmosphere warming?
  • Is this warming causing climate change?
  • Are humans impacting on this warming?
  • If so, what can I do about it?

Is the Earth’s Atmosphere Warming?

  • Review global temps for last 150 years
  • Variations in last 150
    • 19th century – constant; Rise in early 20th; Level off in mid 20th; Rapid rise 1990-2009 - Why?
  • What causes this pattern?
    • Early – volcanoes, sun; Later – Burning fossil fuels
  • Variations on global average temps
    • Land warmer than ocean; More increase towards poles
  • Average temps have risen about 1.5 degrees since start of 20th century. Is this significant?

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