Why is efficency important when discussing energy resources?

Question

Why is efficency important when discussing energy resources?

Answer 1

To get max. out of less

Answer 2

Because energy of all types is going to cost someone money and it costs the consumer the most.

Getting more efficiency for your money is the ultimate goal. That's why fossil fuels are still the most popular and will be until they are gone. They are very efficient and very cheap. Alternate energy sources are less efficient (right now) and more expensive (right now).