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Vacuum energy - Vacuum energy is an underlying background energy that exists in space even when devoid of matter.
Vacuum cleaner - A vacuum cleaner is a device that uses an air pump to create a partial vacuum to suck up dust and dirt, usually from carpeted floors.
Future energy development - Energy development is the ongoing effort to provide abundant and accessible energy, through knowledge, skills and constructions. When harnessing energy from primary energy sources and converting them into ever more convenient secondary energy forms, such as electrical energy and cleaner fuels, both quantity (harnessing more primary energy) and quality (more efficient conversion to ...
Vacuum - For other uses, see vacuum cleaner, vacuum exercise and Vacuum (musical group).'
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