in other words, trust us

Speaking at a Melbourne summit on the green economy, Professor Will Steffen criticised the media for treating climate change science as a political issue in which two sides should be given a voice.

While there were uncertainties about the pace and impact of change, he said, the core of climate science – that the world was warming and the primary cause since the middle of the last century had been industrial greenhouse gas emissions – should be accepted with the same confidence as the laws of gravity and relativity.

Asked about the scepticism of Opposition Leader Tony Abbott, he said scientists respected leaders from both sides of politics who showed respect for scientific expertise.
Sydney Morning Herald, 25 May 2010

more tipping points than a see saw

see_sawEarth may be approaching its points of no return. As Arctic sea ice hits a record low, focus is turning to climate ”tipping points” – a threshold that, once crossed, cannot be reversed and will create fundamental changes to other areas.

“It’s a trigger that leads to more warming at a regional level, but also leads to flow-on effects through other systems,” said Will Steffen, the chief adviser on global warming science to Australia’s Climate Commission. There are about 14 known “tipping elements”, according to a paper published by the US Proceedings of the National Academy of Sciences.
The Age (Australia), 23 Sep 2012