Climate extremes, such as drought, heatwaves, heavy precipitation and more are responsible for 18 to 43 percent of variation in crop yields for maize, spring wheat, rice and soybeans. according to a new article. The researchers have also identified global regions which are highly susceptible to extremes and also supply a high proportion of the world market. Climate change is likely to make these areas more vulnerable in the future with consequent impacts on world markets.