X1014230911-00068-15008</DOCNO> Wynn.CO2.rtf Photosynthesis and Carbon Dioxide Doubling Since the industrial revolution and increased burning of fossil fuels the level of Carbon Dioxide in the earth's atmosphere has been increasing.
(</DOCNO> Wynn.CO2.rtf Photosynthesis and Carbon Dioxide Doubling; increased burning; the level of Carbon Dioxide in the earth's atmosphere) (X1014230911-00068-15008</DOCNO> Wynn.CO2.rtf Photosynthesis and Carbon Dioxide Doubling Since the industrial revolution and increased burning of fossil fuels the level of Carbon Dioxide in the earth's atmosphere; has been increasing; )
</DOCNO> Wynn.CO2.rtf Photosynthesis and Carbon Dioxide Doubling X1014230911-00068-15008</DOCNO> Wynn.CO2.rtf Photosynthesis and Carbon Dioxide Doubling Since the industrial revolution and increased burning of fossil fuels the level of Carbon Dioxide in the earth's atmosphere
increased burning has been increasing
the level of Carbon Dioxide in the earth's atmosphere