Which statement best describes direct energy use versus indirect energy use in a household?

• A. Direct use is energy consumed by devices and appliances; Indirect use is embedded energy in goods and services households consume.
• B. Direct use is energy embedded in goods and services; Indirect use is energy consumed by devices.
• C. Direct use is energy produced on-site; Indirect use is energy imported.
• D. Direct use is energy calculated in bills; Indirect use is energy not in bills.

Answer: (A)

Direct energy use is the energy you actively consume in your home through devices and systems—electricity powering lights and appliances, gas or electricity for heating, cooking, and hot water. Indirect energy use is the energy that was required to produce and deliver the goods and services you buy—the embedded or embodied energy in those items and their supply chains. So the statement captures the idea that direct energy is what you see being used by your devices, while indirect energy is the hidden energy tied up in the products and services you consume.

For examples, running a space heater uses direct energy, whereas the energy that went into mining materials, manufacturing the heater, and transporting it to you is indirect energy. Similarly, buying a shirt involves indirect energy in its production and shipping, even though washing and wearing it at home involve some direct energy as well. The other options mix up where energy comes from or how it’s counted, which doesn’t reflect the distinction between direct use by household devices and indirect, embedded energy in goods and services.