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Politics : The Environmentalist Thread -- Ignore unavailable to you. Want to Upgrade?

To: HPilot who wrote (22450)	7/25/2008 7:17:19 AM
From: Wharf Rat	Read Replies (1) \| Respond to of 36917

"Mars has lots of CO2," For all practical purposes, Mars has no atmosphere... Mars, atmosphere Mars has a very thin atmosphere made mostly of carbon dioxide. The surface pressure on Mars is only about 0.7% of the average surface pressure at sea level on Earth. Also, the atmospheric pressure on Mars changes seasonally because the temperature is cold enough that some of the carbon dioxide freezes during the winter and "snows" onto the polar cap. This greatly reduces the amount of carbon dioxide left in the atmosphere. During the summer, when the polar cap warms up again, the carbon dioxide goes back into the atmosphere. Compare with Venus's atmosphere. Mars also has a lot of dust in its atmosphere, and winds occasionally create large dust storms. Dust devils, which are like miniature tornadoes are very common and have been photographed by spacecraft on the surface. Viking atmospheric measurements Composition carbon dioxide 95.32% nitrogen 2.7% argon 1.6% oxygen 0.13% carbon monoxide 0.07% water vapor 0.03% neon, krypton, xenon, ozone, methane trace Surface pressure 1-9 millibars, depending on altitude; average 7 mb daviddarling.info