Climate change has affected crops across North America through changes in growing seasons and regions, extreme heat, precipitation, water stress and soil quality  . These changes directly influence crop productivity, quality and market price  . Effects of historical climate change on maize, soybean, barley and wheat crop yields vary from strong increases to strong decreases  within North America's agroecological regions, even for the same crop . Across North America, climate change has generally reduced agricultural productivity by 12.5% since 1961, with progressively greater losses moving south from Canada to Mexico , yet responses are highly differential across regions and crops. Some crop loss events are partially attributed to climate change  such as the 2012 Midwest and Great Plains drought, which cost agriculture 30 billion USD . Aridity is extending northward, altering crop suitability ranges ; up to 50% of distributional shifts in growing regions for US crops between 1970 and 2010 may be related
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report