No right turn has a good point about what the market price of carbon will be versus what the government is pricing it at.
As of May, the government is financing based on a carbon price of $13.21 per carbon ton (update CO2). This is ridiculous, when we see other New Zealand prices set between $33.75 and $70. In European market pricing carbon dioxide futures at over 20 euros.
Update: As carbon dioxide is only 27% carbon (thankyou wikipedia), in carbon terms the European futures price is approximately 74 euros per ton. However, I suspect that the govt. and market prices are for CO2 as well, implying that the price per carbon ton is $49 in Treasury estimates.
Whether you agree with the Kyoto protocol or not, we have to pay our Kyoto liability. What good is lying to ourselves about what the size of it will be. Hopefully government environmental policy uses the world price for carbon to make policy, instead of the Treasury price.