LEDs are the most energy-efficient lighting technology available, using up to 85% less energy than incandescent bulbs.

A thermostat is used to control the temperature of a building by turning on or off the heating or cooling system as needed.

Triple-pane windows are the most energy-efficient type of window, as they have three layers of glass that help to insulate the building.

The primary function of an energy-efficient appliance is to use less energy than conventional appliances, thereby reducing energy consumption and costs.

Heat pumps are the most energy-efficient type of heating system, as they can transfer heat from one place to another without generating heat themselves.

The primary function of an energy-efficient cooling system is to use less energy than conventional cooling systems, thereby reducing energy consumption and costs.

Electric cars are the most energy-efficient type of transportation technology, as they do not produce any emissions and use less energy than gasoline or diesel-powered cars.

The primary function of an energy-efficient industrial process is to use less energy than conventional industrial processes, thereby reducing energy consumption and costs.

Precision agriculture techniques are the most energy-efficient agricultural practices, as they use technology to optimize the use of resources such as water and fertilizer.

The primary function of an energy-efficient forestry practice is to use less energy than conventional forestry practices, thereby reducing energy consumption and costs.

Sustainable mining methods are the most energy-efficient mining practices, as they use technology to minimize the environmental impact of mining.

The primary function of an energy-efficient construction practice is to use less energy than conventional construction practices, thereby reducing energy consumption and costs.

Recycling waste is the most energy-efficient waste management practice, as it reduces the need to extract and process raw materials.

The primary function of an energy-efficient water treatment practice is to use less energy than conventional water treatment practices, thereby reducing energy consumption and costs.

Pumped-storage hydroelectricity is the most energy-efficient energy storage technology, as it can store energy for long periods of time with minimal losses.