http://www.aeiveos.com/~bradbury/Papers/GWiaRH.html

"It seems clear to the author, that if humanity wants really to do something about the potential for global warming that may be associated with the accumulated levels of greenhouse gases in the atmosphere that there is little that can be done on land at this time. Changing our forestry or farming practices or reducing our production of the greenhouse gases are not going to significantly reduce the problem we have already created. The path of greatest promise seems to lie first in providing essential nutrients to the carbon fixing phytoplankton in the oceans and then subsequently to engineer one or more species that allow more efficient use of the energy reaching the oceans and in turn make the fixed carbon available as biomass that can be utilized by humans as sources of energy, or more importantly given our growing population, food. "

I reiterate, it has not been proven that reducing man released co2 is the most economic way of reducing the alleged man made global warming 'problem'.