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Accueil > Actualités

Séminaire CIRED : P. Dumas

par Estelle Carciofi - publié le , mis à jour le

Résumé / Abstract

The capacity of land to grow plants results in different consumptive outputs, such as different crops, meat, and milk, and non-consumptive outputs, including carbon storage in plants and soils. One benefit of producing more food on one hectare is increased global capacity to store carbon elsewhere by sparing forests and other habitats while meeting the same food demands. Because climate change strategies heavily rely on maintaining carbon storage and often using land for negative emissions (e.g., through reforestation) even as global food demands greatly increase, 2–4 their success requires increasing the efficiency with which land generates all outputs, yet no suitable system measure exists for measuring such changes in efficiency, particularly when output types change. Here we present a new Carbon Benefits Index, which measures how changes in what, how and how much land produces contributes to the global capacity to store carbon and reduce greenhouse gases (GHGs). We use the index to show how economic modeling and lifecycle analyses (LCAs) have systematically underestimated the carbon storage opportunity costs of land.

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