This book deals with economic policy regarding the Greenhouse Effect using control and game models. First, a literature review is given of intertemporal optimisation models of environmental issues with special focus on the Greenhouse Effect. Next, the issue of sustainability is discussed for different specifications of the natural assimilation function. Furthermore, capital accumulation is considered both in abatement and in human capital. The international dimension is analysed next with focus on the difference between feedback and open-loop solutions, as well as on cooperative outcomes using trigger and renegotiation-proof strategies. Finally, second best forms of cooperation in the form of "issue linkage" and "technology transfers" are worked out.