Climate Change Threatens Global Crop Yields with Uneven Impacts

While some crops and regions may benefit from warming and CO2 fertilization, others face significant declines, exacerbating food insecurity in vulnerable areas.

• Climate change impacts on crops vary widely, with maize yields projected to decline globally, while wheat may see increases due to CO2 fertilization.
• Farmers in tropical regions face the greatest risks as warming pushes crop temperatures beyond optimal levels, reducing yields of staples like maize and millet.
• Extreme weather events, including droughts and flooding, are expected to increase yield volatility and further pressure global food systems.
• Technological advancements and expanded cultivation have masked the negative effects of climate change on crop productivity over recent decades.
• Adaptation strategies, such as improved agricultural practices and development of resilient crop varieties, are essential to mitigate future risks.

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