The European Union (eu) has decided that all flights taking off from and landing in its territory to buy carbon credits to offset greenhouse gas (ghg) emissions. The implementation of the decision

corrosive oceans: Increased carbon dioxide emissions are rapidly making the world's oceans more acidic. If this continues it could cause mass extinction of marine life similar to that which occurred

This article examines the question of how to interpret a relationship between income and carbon emissions in a country (the environmental kuznets curve [EKC] for carbon). A very simple and graphical structural model of an EKC is developed, and the problems of applying the concept to carbon are discussed.