Houses on flimsy foundations

Lobby groups that deny the planet is warming have built their structures in vulnerable locations. Their positions are being eroded by every new piece of evidence.

As their foundations wash away, their time runs out and they become unsteady and more strident. Witness the recent own-goal by the Heartland Institute with its offensive Unabomber billboard. The billboard marked a dramtic shift to the extreme right. It lasted less than 24 hours, but it washed away a sizeable chunk of Heartland's foundations – 11 sponsors worth more than $800,000, board members, all the staff in their Washington DC office, several speakers at a forthcoming conference and a number of notable experts.

If we are patient, we can wait for the evidence of rising temperatures, rising sea levels and ocean acidification to wash away more of these noxious pests. This is the expensive option. Economists warn that the longer we leave it to reduce greenhouse emissions, the more expensive it will be to make the necessary reductions and to cope with the damage.

So, any time you get a chance to chip away at their flimsy foundations, go ahead and do it. You'll be speeding up the inevitable and doing everyone a favour.