CO2 and crop yields..

[furrowtickler]

[Ache4Acres]

CO2 is a gift from god not the bastard child of Mother Nature.

[AlbertaFarmer5]

And one of its biggest benefits is increased water use efficiency. On a year like this, that was vitally important.

[TASFarms]

http://watch.agphd.com/detail/videos/ag-phd-full-episodes/video/6274681979001/plants-carbon-dioxide-glyphosate-price-and-cation-exchange-capacity