It's not just that the billionaire Koch brothers have spent tens of millions to undermine science and stifle debate on climate change. It's that they do it in secret.
"Even by the standards of the super-rich, Charles and David Koch are extraordinarily wealthy. ...The two brothers share a similar political outlook. They are right-wing libertarians who believe in minimal regulation of industry, smaller government, lower corporate taxes and less generous social services. They are also closet 'sceptics' when it comes to climate science. ...
Together, the two brothers have given millions of dollars to non-profit organisations that criticise environmental legislation and support lower taxes for industry.
The Kochs have also contributed vast sums to promote scepticism towards climate change, more even than the oil industry according to some estimates. Greenpeace, for instance, has calculated that ExxonMobil spent $8.9m on climate-sceptic groups between 2005 and 2008; over the same period the Koch brothers backed such groups to the tune of nearly $25m."