A department of the federal executive branch responsible for developing policies for effective use of the nation's energy resources. The Department of Energy is involved in energy conservation, regulating oil pipelines, and encouraging research on new sources of energy.
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |