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By Kenneth Richard on 2. December 2019
Share this… Facebook TwitterEarth’s atmosphere contains 400 ppm CO2 (0.04%). Mars has a 950,000 ppm (95%) CO2 atmosphere. But Mars has surface temperatures that are about -75°C colder on average than Earth’s because atmospheric density, or pressure, is the “game changer” largely determining planetary temperatures. Image Source: Smithsonian National Air and Space Museum Surface temperatures […]