The direct impacts of climate change on crop yields and human health are individually well-studied, but the interaction between the two have received little attention. Here we analyze the consequences of global warming for agricultural workers and the crops they cultivate using a global economic model (GTAP) with explicit treatment of the physiological impacts of heat stress on humans’ ability to work. Based on two metrics of heat stress and two labor functions, combined with a meta-analysis of crop yields, we provide an analysis of climate, impacts both on agricultural labor force, as well as on staple crop yields, thereby accounting for the interacting effect of climate change on both land and labor. Here we analyze the two sets of impacts on staple crops, while also expanding the labor impacts to highlight the potential importance on non-staple crops. We find, worldwide, labor and yield impacts within staple grains are equally important at +3 ∘C warming, relative to the 1986–2005 baseline. Furthermore, the widely overlooked labor impacts are dominant in two of the most vulnerable regions: sub-Saharan Africa and Southeast Asia. In those regions, heat stress with 3 ∘C global warming could reduce labor capacity in agriculture by 30%–50%, increasing food prices and requiring much higher levels of employment in the farm sector. The global welfare loss at this level of warming could reach $136 billion, with crop prices rising by 5%, relative to baseline.

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O propósito deste artigo foi avaliar os impactos da redução do custo de transporte para o setor de soja nas regiões brasileiras. Para atingir o objetivo proposto, foram simulados uma melhoria no sistema de transportes nas regiões brasileiras sobre o setor de soja e os impactos nos principias blocos comerciais, utilizando-se o modelo Projeto de Análise de Equilíbrio Geral da Economia Brasileira (PAEG). Os resultados mostraram que há diferentes efeitos no setor do grão da soja e em indicadores econômicos para cada Grande Região brasileira; as regiões Sul e Centro-Oeste prevaleceram nos ganhos de produção e exportação do grão da soja. Os resultados, no geral, foram coerentes com a literatura, mostrando que uma redução no custo de transporte levaria a melhores resultados para o Brasil; no entanto, os estudos averiguados não consideraram a desigualdade entre as regiões brasileiras, sendo esta inovação um importante diferencial deste trabalho.

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