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There are many direct biological benefits that result from higher atmospheric CO2 concentrations. Two of the most important are increased plant photosynthesis and water-use efficiency.

"Co2: Villain Or Friend? An Exclusive Interview With Keith E. Idso". Interview with Bonner Cohen, www.heartland.org. January 1, 1999.
There are many direct biological benefits that result from higher atmospheric CO2 concentrations. Two of the most important are increased plant photosynthesis and water-use efficiency.