Sunday, April 25th 2010, 1:12 AM EDT

To: Department of StateDate: 23 April 2010Re: U.S. Climate Action Report 2010. 5th ed.Many states around the nation are trying to enact laws to restrict carbon emissions, and industries too numerous to mention have begun making changes hoping to be fully prepared to comply with laws they haven’t seen yet. Congress is considering laws in hopes that they can avoid having EPA impose its own version of CO2 restrictions.Before jumping on this bandwagon, we should be certain that we understand the science. U.S. Climate Action Report 2010, 5th ed. might be understood by some Americans to be the definitive word; however nary a word in the report even pretends toestablish a link between CO2 and putative global warmingshow that the increase in CO2 concentration is due to human activity instead of natural causes (such as natural warming of the oceans)show that either an increase in CO2 concentration or an increase in temperature is, on balance, bad (or worse than laws restricting CO2 emissions) ordo any science whatsoever.Despite screams to the contrary, a vast number of scientists dispute the findings of the IPCC. Perhaps the Department of State believes that “the science is settled.” If so, please let us know which of the two dozen models—see Fig. 1 showing a slight disagreement by a factor of 3000 among the models—settled the science so that all of the others can be thrown into the dustbin of failed science and de-funded.Figure 1: Graph from IPCC’s Fourth Assessment Report, showing calculations by various models. Note that the range of values spans a factor of 3,000.Like an ant crawling out an anthill and concluding that the world is made of 1-millimeter rocks, global-warming activists have looked at the last three-millionths of one percent of the earth’s climate history and made brash conclusions about climate, and especially their understanding of it. They wax eloquent about results from computer models. In the longer view---see Fig. 2—we see that the last million years or so are rather anomalous. The highest CO2 concentrations during the last many ice ages and interglacials are lower than at any other time for the last 300 million years. The dinosaurs lived when CO2 concentrations were 5 to 20 times as high as now. Indeed, such large creatures could not survive without the very verdant conditions afforded by adequate plant food known as carbon dioxide.Figure 2: Carbon dioxide concentrations for the last 600 million years. Points represent actual measurements; lines represent computerized smoothings. The most recent million years is in a very narrow strip to the left of the graph, with concentrations less than 400 ppmv. The right-hand scale is in multiples of quaternary average.That long history teaches us something else. We have all been in an auditorium when somebody was testing out the sound system and there was a sudden screech owing to a “tipping point” wherein the amplified sound at the microphone was loud enough to be picked up and made louder yet. If the people did not act immediately to cut the gain of the amplifier, and everybody just left the room and locked the door, the screech would persist forever if the power remained on. This behavior, often called “running to the rail” by electronics folks, is characteristic of all positive feedback systems. Once you reach the tipping point, there is no return. If high levels of CO2 were to cause the earth to reach a tipping point, it would have done so a long time ago, and we wouldn’t be here talking about it.All in all, there is a best policy to direct toward climate change, and that is to have the courage to do nothing. We humans have precious little to do with climate. When and where did you read anything from climate alarmists that said that humans are responsible for about 3% of all CO2 emissions? When and where did you read anything from climate alarmists that said that warming oceans emit CO2? When and where did the climate alarmists tell you about CO2 levels that were up to 20 times current levels when dinosaurs roamed the earth? When and where did alarmists tell you that the conditions they openly worry about have repeatedly happened without turning the earth into an oven?Nowhere and never, did you say? Perhaps you should consider that you have been deliberately misled.Cheers,Howard HaydenThe Energy Advocatewww.energyadvocate.comVales Lake Publishing, LLCwww.valeslake.com