
There are renewables available cheaper than coal( if you take into account subsidies ), especially in China (the country that dominates those graphics (if you look carefully at the vertical scales). However, there are many political leaders - mainly of older generation - who cannot imagine abandoning coal, they prefer to keep on subsidising, to save traditions and communities, to defend their concept of what made ‘great’ decades ago. In China and India there is also a widespread concept that since the west did this in the past, so now they have to use up an equivalent per-capita share of the atmospheric space - a kind of collective global suicide.
Indeed, it’s to be expected, that the climatic regions best-suited to such agriculture will move, generally polewards. So there may be potentially new ‘breadbaskets’ - but mainly in Russia and Canada, if growing season starts earlier. But 40% of whea and maize, is not 40% of food - there are other (new) crops, and we could also adapt diets, maybe we don’t need so much wheat and maize (leading anyway to obesity?). In the tropics it all depends on water management, need to store more.