Have you ever thought that each and every activity involves a cost?Generally people have no time to think too much about their day to day activity. They just go on living. Most of the people think that if they go on weighing everything in terms of the money involved, then the life will become like a hell.
Breathing is involuntary. It goes on whether we desire it or not. But it too costs in terms of cost of treatment of diseases in case we are breathing in a heavily polluted air. The same applies in case of drinking polluted water and eating contaminated/adulterated food.
However not switching off lights, fans, air-conditioners, if not required costs us directly. Keeping the door of refrigerators open for unduly long periods costs as in the case when we let the gas stove burn even for sometime while doing some preparatory work for cooking.
Have you ever thought that each and every activity involves a cost?