The world is likely to face major disruption to food supplies well before temperatures rise by the 1.5C target. https://www.theguardian.com/environment/2023/aug/12/global-heating-likely-to-hit-world-food-supply-faster-than-expected-says-united-nations-desertification-expert
Global heating likely to hit world food supply before 1.5C, says UN expert

Water scarcity threatening agriculture faster than expected, warns Cop15 desertification president

The Guardian
@rahmstorf
That is a silly thing to say:
It implies that the disruption is yet to happen when the truth is that it has been happening for a while now. A reduction of fruit and nuts of about 3-5% that accounts for yearly excess human deaths of 427,000 in the US alone (Smith et al. 2022).
https://ehp.niehs.nih.gov/doi/10.1289/EHP10947