Question

Which of the following is a disadvantage of most of the renewable energy source?

• A. Highly polluting
• B. High waste disposal cost
• C. Unreliable supply
• D. High running cost

Answer 1

Answer: (C)

Unreliable supply

Another disadvantage of renewable energy sources is the reliability of supply. Renewable energy often relies on the weather for its source of power. Hydro generators need rain to fill dams to supply flowing water. Wind turbines need wind to turn the blades, and solar collectors need clear skies and sunshine to collect heat and make electricity. When these resources are unavailable so is the capacity to make energy from them. This can be unpredictable and inconsistent.