, Hasegawa et al.  project that the number of undernourished people increases by 24 million in 2050, compared with outcomes without climate change and accounting for the CO2 fertilisation effect. This number increases by around 78 million in a low-warming scenario  accounting for the impacts of both climate change and mitigation policies. Caveats to these modelling studies are that most models  are designed for long-term change in climate but not suited to project the impacts of short-term extreme events. The inclusion of adaptation measures into modelling estimates remains selective and partial.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report