When fossil fuel is traded as commodity in global market, do you think you can do something about the energy you consume everyday?
While writing this webpage, ABC television aired Dick Smith's own documentary production - Ten Bucks a Liter. In this show, Mr. Smith made no discussion on engine efficiency. He failed to point out many important "attributes" that differentiate fossil energy and renewable energy. Both factors are important to understand why the world could eventually have petrol price at (or more than) $10/L, if we don't address many important issues, such as, heat engine efficiency.
Archimedes' principle states that: "Any object, wholly or partially immersed in a fluid, is buoyed up by a force equal to the weight of the fluid displaced by the object." This discovery, only to be true if the object is within a gravity field, because only when such object is within a gravity field then "weight" exists.