economic value are projected to become increasingly water dependent. For example, climate-driven yield increases for tea are projected for various tea-producing regions if no water limitations and full irrigation is assumed, but decreases in yields are projected under continued present-day irrigation assumptions . Water-related impacts on global cotton production are highly dependent on the CO2- fertilisation effect, with increases projected for higher CO2 concentration if no water limitations are implemented. However, substantial decreases in cotton production are projected if lower or no fertilisation effects are accounted for due to increasing water limitations . Reductions in economically valuable crops will probably increase the vulnerability of population groups, especially small-holder farmers with limited response options .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report