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SamH
Guest
Agreed.There are dozens of important factors that impact warming and cooling trends. Solar flares, supernovas from stars millions and millions of miles away, the rotation of the earth, meteorite impacts, the amount of trees living, the amount of trees being burned, earthquakes, volcanic eruptions, ratio of ocean water to sea ice, ocean current, distance of earth from the sun (yes, it varies), wobble of the earth’s axis (yes, it wobbles), latitude of the equinox, milankovitch cycles, and even the position of our solar system in the galaxy. You cannot simply say “well it’s warming now, so we’ve got global warming” or “well, there’s no change right now, so obviously there’s no global warming”. All of these factors have different cycles, or are random, and they work together or against each other quite often. It is far more complicated than just checking a thermometer.
Actually we don’t know that CO2 has gone up dastrically (historically) but we do know that it remains a trace gas in relation to the total make up of the atmosphere. CO2 is 393 parts per MILLION, no one has ever designed an experiement that shows any kind of “warming” do to reduced outgoing radiation at those levels.Truthfully, what climate scientists are studying is the past change in the temperatures of the earth. If there had never been an ounce of change for as long as the earth has existed - if from 4.6 billion years ago to today, the temperature over the entire planet were a nice 75 degrees, constantly, always, we should still be worried.
It’s a very simple matter. We know from chemistry that CO2 reflects solar rays and traps heat better than plain air. We also know that Methane is even more effective than CO2 at trapping heat. We also know from simply measuring the levels in the atmosphere that CO2 levels are going up drastically. After that, it’s very simple - more CO2 means more heat. Since there is more CO2, there is going to be more heat. And the more CO2 (and methane) we add, the more heat there will be. Regardless of what has happened during the earth’s history, these very simple facts remain true.