The price to turn the world economy into a green Utopia? Only $76 trillion.

Two years ago, U.N. researchers were claiming that it would cost “as much as $600 billion a year over the next decade” to go green. Now, a new U.N. report has more than tripled that number to $1.9 trillion per year for 40 years.

So let’s do the math: That works out to a grand total of $76 trillion, over 40 years — or more than five times the entire Gross Domestic Product of the United States ($14.66 trillion a year).

But hey, we’re saving the world, right? Well, not really. We’re just spreading the world’s wealth around.

The press release for the report discusses the need “to achieve a decent living standard for people in developing countries, especially the 1.4 billion still living in extreme poverty, and the additional 2 billion people expected worldwide by 2050.” That sounds more like global redistribution of wealth than worrying about the earth’s thermostat.

That’s because it is. The report goes on and says “one half of the required investments would have to be realized in developing countries.” In other words, $38 trillion would go to the developing world.

My take: We need to disband the UN. If this report isn’t evidence of massive and dangerous mission creep, then nothing is.