IPCC

Getting clear on climate facts

With the Intergovernmental Panel on Climate Change (IPCC) poised to release its Fifth Assessment of the science underpinning our understanding of climate change, it’s useful to take a step back and recap some of the “big picture” facts.

What is already clear from the science:

  • Carbon dioxide and other greenhouse gases act to warm the planet.
  • Carbon dioxide is accumulating in the atmosphere due to emissions from human activities.
  • The Earth has been warming during the past century. The amount and speed of the warming is unusual compared to past records.
  • Humans’ emissions of greenhouse gases are largely responsible for this warming.
  • If emission rates continue, the warming in the 21st century will be much more significant than the warming in the previous century.
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