A warmer, wetter climate with more carbon dioxide in the atmosphere would undoubtedly produce more plant growth and more food.
However climate-cooling policies that claim to prevent global warming by throttling the use of carbon fuels will definitely reduce food supply and increase food prices.
The promotion of ethanol for motor fuel is anti-food. This “food for fuel” program has absorbed significant quantities of corn, soy beans, sugar and palm oils. Consequently prices for ethanol crops are higher than they would otherwise be, encouraging farmers to convert land currently devoted to grazing animals and other food crops to growing more profitable crops for ethanol.
Extreme greens also practise plant discrimination, favouring more trees at the expense of natural grasslands and open forest that support many grazing animals. These polices take many forms including planting carbon credit forests, banning regrowth clearing, anti-development zoning and blanket tree protection reserves. All such policies reduce food production from grasslands.
Climate-cooling policies also aim to decrease demand for carbon fuels, including coal, oil, gas and refined motor fuels, by increasing their costs and prices. Modern food production is totally dependent on low-priced carbon fuels for all farming activities. Diesel fuels are needed for cultivation, planting, harvesting and transport; and coal/gas powered electricity for irrigation, processing and distribution. Higher prices for carbon fuels will send some marginal farms out of business. The same policies will reduce profits and production in the fishing industry. All of these policies are anti-food.