Which of the following best describes the reliability of wind energy?

• A. It is intermittent, depending on wind availability.
• B. It provides continuous, 24/7 power without storage.
• C. It depends entirely on fossil fuels for backup.
• D. It is unaffected by weather or climate.

Answer: (A)

Reliability of wind energy revolves around the fact that wind isn’t constant. Turbines only generate power when the wind is blowing at sufficient speeds, and when it slows down or stops, output drops. That variability occurs with weather, time of day, and seasons, so wind power can rise and fall rather than provide a steady, always-available supply. This intermittency is a fundamental property that grid operators must manage through backup generation, storage, and system design to keep electricity reliably available.

The other statements imply things that aren’t true for wind: it doesn’t provide continuous 24/7 power without storage, backup or balancing; backup is not inherently fossil-fueled in all systems; and wind output is indeed affected by weather and climate, not unaffected.