of small projects. It's money from individuals, companies and governments and we believe these are the type of measures that can be carried out without waiting for an international deal on climate change at the UN. Talks on a global deal to create a system for all countries to make binding emissions reductions will continue in Doha at the end of this month. The current timetable is to agree the rules by 2015 and for commitments to begin from 2020. "We're trying to think of a strategy for the interim and this is a good one," says Jones. "Governments can help without spending any money. They can mandate [sustainability] reporting, mandate [energy efficiency] labelling and relax building codes." Jones gives the example of a German apartment block owner who was permitted to add an additional floor to his building in return for investing in energy efficiency in all his tenant's flats. His rental income grew by 20% and the residents bills fell by 87%. At present, around one third of the potential energy savings from efficiency measures are being exploited. The lesson from the US is a surprising one. Following the mantra "drill, baby drill" is not enough by itself to achieve energy self-sufficiency and it does little for the climate. With an increasingly complex outlook for international gas trade flows, the imposition of a global cap on carbon emissions and a shift in the centre of gravity of the world's energy suppliers, the case for energy efficiency just keeps