<Ul> <Li> <P> Global fossil carbon emissions 1800--2007 . </P> </Li> <Li> <P> False - color image of smoke and ozone pollution from Indonesian fires, 1997 . </P> </Li> <Li> <P> Biosphere CO flux in the northern hemisphere summer (NOAA Carbon Tracker). </P> </Li> <Li> <P> Biosphere CO flux in the northern hemisphere winter (NOAA Carbon Tracker). </P> </Li> </Ul> <Li> <P> Global fossil carbon emissions 1800--2007 . </P> </Li> <P> Global fossil carbon emissions 1800--2007 . </P> <Li> <P> False - color image of smoke and ozone pollution from Indonesian fires, 1997 . </P> </Li>

Where does the carbon dioxide in our atmosphere come from