NASA Climate Change
UPDATE: Global average atmospheric carbon dioxide concentration reached 398.54 parts per million (ppm) in July.
More info: http://bit.ly/CO2-concentration
Carbon dioxide (CO2) is an important heat-trapping (greenhouse) gas, which is released through human activities such as deforestation and burning fossil fuels, as well as natural processes such as respiration and volcanic eruptions. The chart on the left shows the CO2 levels in the Earth's atmosphere during the last three glacial cycles, as reconstructed from ice cores. The chart on the right shows CO2 levels in recent years, corrected for average seasonal cycles.
More info: http://bit.ly/CO2-concentration
NOTE: Data from NASA's new Orbiting Carbon Observatory-2 satellite is not included in the July measurement, but stay tuned. Learn more about OCO-2: http://oco.jpl.nasa.gov/.
Zapojte se do diskuse a nešetřete ji. 
)