Konsentrasi CO2 juga menurun, apakah ada mekanisme alam yang menyebabkan penurunan ini ?
Carbon dioxide (CO2) is an important greenhouse gas released through natural processes such as respiration and volcano eruptions and through human activities such as deforestation and burning fossil fuels.. The chart on the left shows the historical levels of CO2 in the Earth's atmosphere. The chart shows CO2 levels in recent years, which have been measured continuously since 1958.
Is the level of CO2 in recent years going down by natural mechanisms ?
http://climate.jpl.nasa.gov/keyIndicators/index.cfm#GlobalTemperature