https://www.sciencedaily.com/releases/2019/12/191202102035.htm

By combining climate models with global employment, economic, and food security data, a group of scientists has analysed the potential effects of climate change on two key food sectors: agriculture and fishing.

Adopting the scenario of no reduction in greenhouse gas emissions, they have shown that roughly 90% of the worldwide human population -- for the most part living in those countries most vulnerable to climate change and less able to adapt to it -- would likely face productivity losses for agriculture and fishing, while less than 3% of the population would see simultaneous gains in productivity in their regions of the world by 2100. This scenario offers extremely little room for adaptation. It would be impossible to offset the impact on fishing by developing agriculture, or vice versa: both sectors would be hit hard.