You suggest that saving energy with low-e glass may require a tinted window.

Saving energy will require your employees to take on some of the responsibility.

And the less energy required for the message torp, the more left with the ship.

The body's energy demands whilst strolling do not require extra oxygen.

Because energy requires long-term investment, we looked ahead to 2050 to set the overall context.

The energy required to move that system into a falling phase is very little.

To give an electron that much extra energy would require relativistic speeds (near the speed of light).

That energy would require six million barrels of oil a day if it were generated by fuel.

Managing energy can require a system of systems approach.

Sustainable energy also requires large-scale projects, and this is why Government commitment is required.