[HospiceNurse]

http://www.historylink101.com/lessons/farm-city/yeild.htm

Interesting that crop yields have actually doubled or trippled around the world between 1961 and 2000. Raw data are useful things.

[listenhillary]

We would see a 10 to 12 percent decrease in grain crop yields if we managed to cut the atmospheric CO2 back to 1850 levels.

Conifer growth would be stunted by 30%.