Future warming will negatively affect food systems in Africa by shortening growing seasons and increasing water stress . By 1.5℃ global warming, yields are projected to decline for olives  and sorghum  with a decline in suitable areas for coffee and tea . Although yield declines for some crops may be partially compensated by increasing atmospheric CO2 concentrations, global warming above 2℃ will result in yield reductions for staple crops across most of Africa compared to 2005 yields , even when considering adaptation options and increasing CO2 . Relative to 1986-2005, global warming of 3ºC is projected to reduce labour capacity in agriculture by 30-50% in sub- Saharan Africa. 
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report