migold

Alors que l'aviation est depuis ses débuts un sujet de rêves et d'exploits qui suscite un fort intérêt de la société, elle est maintenant prise dans la tourmente de la transition climatique. D'un côté on vante l'avion vert qui va solutionner tous les problèmes, et de l'autre, on parle de “flygskam”, la “honte de prendre l’avion”, pour un transport désormais à bannir. Face à ces passions qui se déchainent, Carbone 4 vise à éclairer le débat en répondant à une série de questions-réponses avec une approche scientifique et chiffrée.

Human activities are threatening to push the Earth system beyond its planetary boundaries, risking catastrophic and irreversible global environmental change. Action is urgently needed, yet well-intentioned policies designed to reduce pressure on a single boundary can lead, through economic linkages, to aggravation of other pressures. In particular, the potential policy spillovers from an increase in the global carbon price onto other critical Earth system processes has received little attention to date. To this end, we explore the global environmental effects of pricing carbon, beyond its effect on carbon emissions. We find that the case for carbon pricing globally becomes even stronger in a multi-boundary world, since it can ameliorate many other planetary pressures. It does however exacerbate certain planetary pressures, largely by stimulating additional biofuel production. When carbon pricing is allied with a biofuel policy, however, it can alleviate all planetary pressures. In the light of nine Earth Syst