It wasn’t that long ago – Nov. 11, 2009 to be exact – when lefty writer Naomi Klein, author of “The Shock Doctrine: The Rise of Disaster Capitalism,” told readers the cost of going green was going to be $600 billion a year.

Eighteen months later, the price of our “one last chance to save the world” has increased $13 trillion – and that’s just over the next decade.

The Klein piece was controversial because she admitted the left was looking for the first world to pay a “climate debt,” what she described as “the idea that rich countries should pay reparations to poor countries for the climate crisis.” The new U.N. report doesn’t use those terms, but they are there in spirit.

The U.N. calls for a push toward the “green economy” even though it freely admits “there is no unique definition of the green economy.” The survey’s introduction rationalizes the massive cost by explaining “the green economy concept is based on the conviction that the benefits of investing in environmental sustainability outweigh the cost of not doing so.” So, by that rationale, any cost is sustainable.