Nothing happens without an energy cost. That is virtually as basic as the laws of physics. Nothing is made, nothing is grown, nothing moves, without an energy cost. The lower the real cost of its energy, the more productive any business or other economic unit will be.
The three value factors of energy include its cost in money per unit of energy, the cost to the environment, and the cost for transport. These three factors affect the sum total cost of energy to any user in many ways. Since the cost of energy directly affects value and profitability, it is important that everything practical be done to lower overall energy costs. There are only two ways to do this, reduce energy consumption, and reduce energy costs.