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About Climate Change

The earth’s atmosphere is made up of oxygen, a large amount of nitrogen and certain other gases, including a small percentage of greenhouse gases.

Greenhouse gases act like a blanket around the earth. When the balance is right, they trap warmth from the sun and make life on earth possible. However, increasing the concentration of greenhouse gases in the atmosphere traps too much heat and causes the climate to change. Increases in concentrations of greenhouse gases, such as carbon dioxide, methane and nitrous oxide, are largely a result of human activities such as burning fossil fuels, deforestation and agriculture.

Although the climate changes as a result of natural processes and we have always experienced periods of extreme weather, the increase in greenhouse gases is generating changes in global, national and local climate at unprecedented rates, resulting in:

  • Sea level rise
  • Acidification and warming of the oceans
  • More heavy rainfall and flooding events
  • More frequent and more severe droughts with greater fire risk
  • Stronger winds
  • More extreme temperatures, more often.


indicators of a warming world

In our daily lives, there are lots of examples of damage caused to people, properties, infrastructure and businesses by extreme weather events (flooding, soil erosion, landslides, droughts), as well as threats to native flora and fauna and cultural sites of significance due to changed natural conditions or shortages of water supply.

No one knows for sure just how much the climate will change in the future, but we know there will be change, and it will have broad environmental, social, economic and cultural impacts.

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