It is predicted that there will be a serious _____________ of energy in the future. (short)
. Renewable energy is an __________ source of energy. It is unlimited. (exhaust)
. One of the ______________ of wind power is that it is unavailable. (advantage)
. Will ______________ energy sources be banned from using in the future? (new)
shortage | inexhaustible | advantages | nonrenewable
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