[Hoot Gibson]

Well it seems to me that you need to be re-educated in science becuase you are way off base here. Yes the earth has gone through cycles, yes it will continue to do so, but it has never happened at this pace, and the records show that an increase in CO2 directly corresponds to rise in tempature. We know that high amounts of CO2 in atmospheres can cause extremely high temps, and it occurs not only on earth, but other planets also just look at the atmosphere of Venus, 90% CO2, and has an average temp of 753K (476 C, 888 F, Earths avg T is 59 F). Our atmosphere has no where near that amount of CO2, its something like 0.004%, but with the vast amounts of CO2 we put in the atmosphere, the % can drastically change.

Wow! That is one big load of unrelated information. Actually, ice cores indicate that on earth, CO2 has risen in response to temperature increases.

As for Venus, it is roughly one-third closer to the main heat source in our solar system = the Sun - a fact that most likely contributes heavily to the planet's high temperatures. There is no evidence to suggest that Venus was ever an earth-like planet, so I am not sure what kind of point you are trying to make here. One thing is almost certain - the temperatures on Venus have not been affected by humans.

If you want to use other planets to make your case for man-made global warming, you might want to look at the warming trends on the planets further from the sun than earth and ask yourself why warming trends have been detected elsewhere in the solar system without any human contributions of CO2 emissions.

Another fact on which you might want to educate yourself is the relative precision of the instruments used decades ago to compile historical temperature records. Many thermometers that were used were incapable of measuring temperatures with a precision of more than a couple of degrees and the accuracy of those measurements depended on the skill of the observer and the calibration of the instrument. Just how accurately do you think scientists are capable of estimating temperatures based on ice cores, tree rings, or other methods in the absence of direct thermometer readings?

What we do know is that areas like Greenland and northern Britain were once much warmer than they are today and that was hundreds of years before the Industrial Revolution. Within a couple of centuries, the earth's temperatures had dropped precipitously and mankind found itself in the middle of the Little Ice Age.