61.   Clinton hopes high tech solutions will improve energy efficiency so that Americans can meet agreed international emissions standards without hurting the economy.

62.   Consumers who weigh the energy efficiency of appliances they are buying usually look for a three-year payback.

63.   Cooper said direct-vented fireplaces are the best choice for most consumers because of their safety and energy efficiency.

64.   Concentration on energy efficiency and renewable sources not only makes economic sense but also represents perhaps our best hope of tackling the causes of climate change.

65.   Dan Reicher, assistant secretary for energy efficiency at the DOE, said the government is considering similar projects for military ships, tanks, and planes.

66.   Dan Reicher, assistant secretary for energy efficiency at the Energy Department, said the tests went nowhere.

67.   Democrats have lined up against the plan, arguing that it emphasizes supply at the expense of the environment and calling for more emphasis on energy efficiency.

68.   Despite the proliferation of four-wheel drive vehicles and outsized family homes, average energy efficiency is way up.

69.   Energy efficiency and security should be considered along with beauty when replacing a front door.

70.   Energy efficiency is vital to reducing emissions because carbon dioxide is produced by burning coal, oil and natural gas, the fuels that make modern economies run.