“A Half-Century Increase in Global Terrestrial Net Primary Production Driven Primarily by Rising Atmospheric CO2,” by Craig D. Idso.
…”The second “National Assessment” of the effects of climate change on the United States warns that rising temperatures will necessarily result in the reduced productivity of major crops, such as corn and soybeans, and that crops and livestock will be “increasingly challenged.” Looking to the future, the National Assessment suggests that the situation will only get worse, unless drastic steps are taken to reduce the ongoing rise in the air’s CO2 content (e.g., scaling back on the use of fossil fuels that, when burned, produce water and CO2).”
“But is this really the case? If growing crops are increasingly affected, damage should also be showing up in the global ecosystem. Is the productivity of the biosphere in decline?”
“In a word, no! Observational data indicate that just the opposite is occurring.”