Yesterday Crikey reminded me about this video. I’d seen it before, but it’s worth seeing it again — particularly during the election campaign — and showing it to as many people as possible.
The message is simple. Perhaps we can never be 100% sure that global warming is primarily caused by human activity. However the risk of this being the case and us doing nothing about it far outweighs the risk of changing our behaviour and then finding out it wasn’t necessary.