A new refrigerator with environmental classification A ++ uses 110 kWhel per year ("direct" energy use). 896 kWh of energy is needed for the production of materials, production, transport, storage, sales and disposal ("indirect energy use") of such a refrigerator: A- Calculate CO2 emissions if the refrigerator is used for five years by the energy mix in the Swedish energy system.

B- If we assume that the energy used to manufacture the refrigerator only comes from lignite (greatly simplifying reality), how many years must we use the refrigerator for CO2 emissions from "direct" energy use to exceed that from "indirect" energy use?