The proposed scheme of the Climate Opportunity Initiative is a very ambitious one. Not only is it based on a new approach to align the short-term self-interest of countries with climate action, but also its scope is very broad covering all greenhouse gases. So the question arises whether the proposed approach could be implemented and tested with a pilot scheme that has a more limited scope. This blog entry makes the case that hydrofluorocarbon (HFC) emissions would be an idea