I must respond to the letter by Mr. Ghan (Letters, July 29) on the subject of global warming. He is repudiating Mr. Goltzs' letter (July 22).
First of all, the ice ages were never a factor until about 2 billion years ago when the super continent Pangaea broke apart and created smaller land masses, mountain ranges that disturbed ocean and air currents. And to say that CO2 is the main cause of global warming is false as the continents continue to move and affect air and water currents.
Second, be honest! CO2 levels in today's atmosphere is approximately 0.0039 percent as compared to nitrogen at 79 percent. Methane is a trace gas. Unless somebody is reporting levels that they measured downwind of a dairy farm!
Last, as I said before, CO2 concentrations follow global warming, they do not precede the warming.
P.S. One fact I found interesting is that the U.N.'s rubber stamp agency the IPCC is funded by money they get from U.S. taxpayers! I wonder what would happen if that money suddenly vanished? Bet their opinions on global warming would be in the opposite direction.
LARRY LOWRY, Richland