And Obama’s coal plant rules would accomplish even less than this calculation which applies to the totality of U.S. carbon emissions:
Let’s assume that U.S. fossil fuel use results in 6 billion metric tons of carbon dioxide emitted into the atmosphere annually and that, of this amount, about 40% (2.4 billion tons) stays and accumulates in the atmosphere annually.
Atmospheric carbon dioxide is measured in parts per million and one part per million of carbon dioxide weighs approximately 7.81 billion metric tons. Simple division, then, shows that the U.S. might be adding at most approximately 0.31 parts per million to the atmosphere every year.
If the carbon tax could magically stop U.S. emissions entirely as of 2013, then by the year 2100, we would have avoided adding about 27 parts per million (0.31 x 87) of carbon dioxide to the atmosphere.
That may sound like a lot, but consider that the current level of carbon dioxide in the atmosphere is about 391 parts per million. The U.S. Environmental Protection Agency estimates that atmospheric carbon dioxide levels in the year 2100 could range from 450 parts per million (absolute global clampdown on greenhouse gas emissions by mid-century) to 950+ parts per million (no clampdown).
Either way, it’s plain to see that a savings of 27 parts per million over 87 years is trivial, particularly in comparison to its cost (shutting down the entire economy) and would make no meaningful climatic difference even if atmospheric carbon dioxide was the driver of global climate that the alarmists claim it is.