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Help us predict global warming

Coal is the worst climate offender Enlarge Image

Stop climate change

The world's leaders meet at the end of 2009 in Copenhagen to determine the fate of the climate. They could set us on the path to a deep emissions cuts or they could lock the planet into catastrophic, irreversible climate change.

Global Warming and Energy

The time to stop global warming is now. The health of our planet lies in the balance.

Take action

With the world on the brink of runaway climate change, millions are anxious about the effects that a warmer globe will have on our everyday lives. Wanting to learn, act and agitate is a perfectly valid response.

Temperature change 1765-2100: Graph excerpted from the IPCC's Third Assessment Report showing past and predicted changes to global temperature. Enlarge Image

Science

Climate change is a reality. Today, our world is hotter than it has been in two thousand years. By the end of the century, if current trends continue, the global temperature will likely climb higher than at any time in the past two million years. While the end of the 20th century may not necessarily be the warmest time in Earth's history, what is unique is that the warmth is global and cannot be explained by the natural mechanisms that explain previous warm periods. There is a broad scientific consensus that humanity is in large part responsible for this change, and that choices we make today will decide the climate of the future.

The specks on ice are explorers Lonnie Dupre and Eric Larsen, setting off on the first ever unsupported summer crossing of the Arctic Ocean in order to draw attention to global warming. Enlarge Image

Climate research

It was realised by the mid-18th century that some gases in the Earth's atmosphere, such as carbon dioxide, trap heat and keep the Earth warm. At the start of the 20th century, a Swedish scientist named Svante Arrhenius put forward the idea that human emissions of carbon dioxide would eventually raise temperatures. He didn't see this as a particularly bad thing, and most scientists at the time were sceptical that humans could burn fossil fuels fast enough to have a noticeable impact at all.

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