The World Resources Institute has put a calculator online that promises fun for all ages:

The average American is responsible for about 20 tons of carbon dioxide emissions each year, a far greater per capita number than that of any other industrialized country. In fact, the US accounts for more than 20% of the world’s total greenhouse gas emissions. You can reduce your carbon footprint by driving a more efficient car, or driving less. You can also plant trees or help preserve forests to offset your emissions, since trees are a sink for carbon.

I guess it is targeted for Americans.

I have often wondered how people calculate their carbon footprint when they talk about offsetting it. I mean the political mudslinging lately seems to have been linked to who has the bigger footprint and what can be done individually to compensate. For example, what is President Bush’s carbon footprint? Is it higher or lower than prior Presidents? Is testing Bush on compliance going to end up down the same road as the “Click It or Ticket” campaign where he promised to support a crackdown on drivers who disobey the law, while he paraded around in disregard?

Bush did not violate Texas law. “On private property, you’re not required to wear your seat belt,” said Tela Mange, a spokeswoman for the Texas Department of Public Safety. She said “it’s fairly common” in the ranchlands of Texas.

Will Bush try to come up with a similar justification for carbon emissions exemptions? Should the calculator have an option “click here if you are a member of the Bush family”?

After all, isn’t the reason for the seatbelt law to prevent some people from causing harm to themselves that others ultimately have to pay for (through the externalities of the insurance and emergency response system)? Or perhaps the Department of Safety is simply saying they have no jurisdiction on private roads, which raises a whole other discussion (libertarians, start your engines) about the “corporal” right to pollute on personal property.

Anyway, it would be nice if politicians could publish their carbon footprint data as a matter of public record, including the impact from private spaces.

In case anyone is interested, the calculator says my footprint is apparently far less than the national average. I suppose that has something to do with driving a biodiesel car that gets almost 40mpg and walking to work on most days.

Seems to me that the calculator should end with “and this is what you can do to offset your footprint: plant x trees…”. And it should perhaps also offer a range, or some measure of certainty, since the calculations are really just estimates.