An awful lot of nonsense about climate change is spouted, as we know. I think the thing that bugs me the most though is that people don't seem to be understanding the very reports they rely upon for their logic and calls to action. You know, things like various greenies insisting that we should revert to local and regional economies....when the very IPCC report they rely upon for predictions of climate change states that this would make things worse, not better.

Today's example comes from the private sector:

Airline passengers should pay a global tax on carbon and accept an increase in the cost of flying for the sake of the environment, the chief executive of British Airways has told The Times.

The airline is the first in the world to propose that all airline passengers should pay an additional sum which would be likely to rise steadily over time.

BA is proposing that the tax should raise at least $5 billion (£3 billion) a year to be used to combat tropical deforestation and help developing companies to adapt to climate change.

That there should be a price for carbon emissions, as there should be for other externalities, I have no problem with, indeed welcome. And as the Stern Review pointed out, we can do this either by Pigou taxation or by cap and trade. We'll leave aside the bit where that report points out that it doesn't matter what you spend the taxes on, it's simply the addition into market prices of those costs that does the work.

But what I would like Bill Walsh (for it is he suggesting this) to understand is that the very same report/review which provides logical support for this position also gives us what that price should be. And as a result of that suggestion, Gordon Brown has doubled Air Passenger Duty. As far as Stern is concerned, as far as both the price and logic of the argument are concerned, the external costs of aviation are already included in the market prices people pay to fly from or to the UK.

It's already been done, no more taxes are needed. It would be fine to call for a different system, but not to call for an additional one.