1.   But Clinton insists that new technologies will improve energy efficiency, enabling developing countries to continue economic growth without increasing emissions.

2.   Can energy efficiency and a greater dependence on natural gas cut carbon emissions sufficiently on their own?

3.   Energy efficiency and renewable energy go hand in hand.

4.   Energy efficiency can play a huge role in reducing pollution.

5.   Energy efficiency is top of the agenda.

6.   Environmentalists stressed the importance of energy efficiency as offering the best prospect of limiting global warming.

7.   Has he any new initiatives in the pipeline for energy efficiency in the business sector?