Martian-made global warming? - JSOnline

National Aeronautics and Space Administration researchers studied all the weather data going back to 1903, the first year that reliable long-term records started being kept. They, too, found that the Earth had warmed up a bit, but according to its climatologist, Ray Spencer, temperatures have been falling for the past five years.

But being good scientists, the NASA researchers decided to compare that to the only other planet that we have reliable, long-term data for: Mars. They found that temperatures there are 0.5 degrees Celsius warmer now than they were in 1973. But, unlike Earth, the Red Planet is still heating up. That has caused some problems.

If global warming is man-made, where are the thousands of factories and massive traffic jams that would be needed to heat up Mars? On the other hand, if this is just a natural planetary cycle, could that mean Earth is having one as well? But if that's true, why is Mars still heating up and Earth is not?

The activity at the polar ice caps are a perfect example. Spencer says on Earth, the arctic ice has grown more on a percentage basis this winter than at any time since 1979. However on Mars, according to the Jet Propulsion Laboratory, the South Pole has shrunk three years in a row, in such a way that it indicates a climate change. Again, why? [Via An Honest Climate Debate]

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