<unk> <unk> <unk> <unk> <unk> Electrical energy must be generated at the same rate at which it is consumed.<unk> Electrical energy must be generated at the same rate at which it is consumed. •••••••••••••••••••••••••••••••••••••••••••••••••••••••• <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Examples include the U.S. Northeast blackouts of 1965, 1977,
2003, and major blackouts in other US regions in 1996 and 2011.<unk> ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ <unk> <unk> <unk> <unk> <unk> <unk>