Why is the world's climate changing?

There are natural changes in our climate. These are caused by:

  • variations in the energy from the sun
  • the way the earth orbits the sun
  • the way oceans transfer heat from one area to another
  • volcanic activity (dust particles released in an eruption can disrupt the atmosphere)

Humans also cause changes to our climate. The biggest contributor is gas released into the atmosphere from cars and burning fossil fuels. MEDCs contribute the most in carbon dioxide. Other gases such as methane (produced from cow dung, decaying landfill and peat bogs) also contribute to climate change.