Forbes: Next year in Copenhagen, world leaders will assemble and attempt to write the successor agreement to the 10-year-old Kyoto protocol. In order for countries to make dramatic reductions for a greener future, energy efficiency will likely be a big part of the equation. What they’ll find is a huge gap between countries with a head start, and those still in the blocks. Not surprising, the countries with the most energy-efficient economies are those who import their energy supplies. …