Global Cropland Increase by 9 Percent

Source

There are several computer models available to predict the future of climate. The model used by the IPCC and governments (especially the Canadian Government ) is the Representative Concentration Pathways 8.5 (RPC 8.5) climate model. RPC 8.5 is the worst-case scenario and was never intended to be used to create climate policy.

Moss and colleagues specifically state that "RCP8.5 cannot be used as a no-climate-policy reference scenario for the other RCPs because RCP8.5's socioeconomic, technology and biophysical assumptions differ from those of the other RCPs."
The high-emissions 'RCP8.5' global warming scenario

One of the predictions made by people who use the RPC 8.5 climate model is future food shortages because high CO2 will reduce cropland. When we compare conjecture with reality, NASA has observed that croplands have increased by 9 percent in the last twenty years. This observation is surprising since this is never acknowledged in promoting the adverse effects of elevated CO2.
This increase is not due to deforestation. Having an increase in CO2 means that arid land can grow crops. The relationship between a plant's ability to absorb CO2 and not lose water through its stomata is the main reason it is considered a greenhouse gas. Plants need CO2 to increase their biomass. A plant needs to balance opening a stoma to intake CO2 against losing water. Having more CO2 in the air means the stoma can open for a shorter period. As CO2 increases, more and more arid land will become fertile.