Which of the following is a primary challenge of using many renewable energy resources?
Most renewable energy resources are found only on a few of Earth's continents. There are currently no cost-effective ways to use renewable energy supplies. There is not enough energy in solar or wind to meet the needs of the global population. They are diffuse and intermittent.
The primary challenge of using many renewable energy resources is that they are diffuse and intermittent. This means that renewable energy sources like solar and wind are not always available at the times and places where energy is needed, which can make it difficult to rely on them as a consistent energy supply without effective storage or backup systems.