A more thorough explanation:

The Secretary of Energy is a member of the President's cabinet who is responsible for leading the U.S. Department of Energy. This department is in charge of developing and implementing policies related to energy and nuclear security.

• The current Secretary of Energy is Jennifer Granholm.
• The Secretary of Energy oversees the management of the nation's nuclear weapons program.
• The Secretary of Energy is responsible for promoting the development of renewable energy sources, such as wind and solar power.

These examples illustrate the role of the Secretary of Energy in overseeing the nation's energy policies and programs. The Secretary is responsible for ensuring the safe and efficient use of nuclear energy, as well as promoting the development of alternative energy sources to reduce the country's dependence on fossil fuels.