In the context of economic instruments for more energy efficiency and climate protection, tradable certificates have been investigated for renewable energy and for a number of emissions. In contrast, tradable energy efficiency - or "white" - certificates have only lately been considered as a...

In a carbon constrained world, at least four classes of greenhouse gas mitigation options are available: Energy efficiency, fuel switching, introduction of carbon dioxide capture and storage along with renewable generating technologies, and reductions in emissions of non-CO2 greenhouse gases....