Question: Will there ever be a source of infinite clean enrgy?

Gopal Ramchurn answered on 19 Jun 2013:

I don’t think there’s any ‘infinite’ source of energy but there are sources of energy that are clean and have a life span that is measured in trillions of years rather than one year or two. Examples are solar and wind power. The sun is likely to shine for many years to come as will wind blow as long as the earth has an atmosphere. We could also use heat from the earth (which cools down at a very low rate) or the movement of tides and waves!