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

Explanation

The correct answer isUnreliable supply. Most renewable energy resources are clean because they do not produce any pollution. Most renewable energies are cheap because their energy supplies do not have any cost. Important Points ENERGY SOURCE ADVANTAGE DISADVANTAGE Wind turbines Clean and cheap to run. Expensive to set up and the wind does not always blow. Tidal generators Clean and cheap to run and produce a lot of electricity once running. Very expensive to set up and could be hazardous to local wildlife. Hydroelectric power stations Clean and cheap to run. Expensive to set up and output could be affected by drought. Solar cells Clean and cheap to run. Not always sunny and output does not always outweigh the initial cost to set up.