Hkelukka wrote:So lets get cranking our minds and learning of ways to convert our physical energy to something else 
Really cool topic, Hkelukka! The problem with converting mass into energy lies in the method, which brings us back to chemistry and the key to the future of successful energy conversion (imho) is understanding the dynamics of the particles themselves (getting deeper into quantum mechanics and applying that knowledge to chemical reactions). Currently, we only use destructive methods to "manufacture" energy... mainly fire (fission.. breaking molecules apart to release energy). Burning natural resources is the quick & easy caveman method. The science for clean, stable and more efficient (non destructive) energy already exists (ie. Nikola Tesla), and I believe cold fusion has been successfully achieved, although the information would never be available to us lay people. The crazy obsession of money is too overpowering to those lizards that "control" information for the masses. See, the hidden agenda is still very Matrix-like (the movie)... We, as a mass of humans, create more energy (both physical and metaphysical) by continuing with the same destructive use of "modern technology" (that was supposed to make our lives easier so we could have more leisure time)...in order to cause more stress and have less time for us to think clearly... because *gasp*... if people had more time on their hands, they might actually be able to begin thinking for themselves.... and they just can't have that. The government actually spends hundreds of millions of dollars a year on propaganda for the US civilian population. (yes, I know that for a fact... father used to be in psy-ops)
Hkelukka wrote:Imagine if one had the ability to convert ones internal mass (fat for example) into pure energy, one human has enough mass to sustain the worlds power production for a very long time.
I can just see the insane advertising campaign for liposuction, too!.... "C'mon baby, light my fire..."
Fat people would be all the rage... Fast food industries would flourish even more than they already are... The average life expectancy would plummet, and I have a feeling that everyone would be fine with that.... "Soilent green is people...." *cringe* But the problem of "over population" would be solved... *double cringe*
But back to the question at hand.... My first instinct in determining the best energy source in any given environment is to look at what there's the most of.... In the Earth's case, it's water... Salt Water, to be more specific.... Salt Water is HIGHLY conductive (for electricity).... Now, I'm not a scientist (not by a long shot), but I think we should be able to develop a method of extracting energy from the Oceans in a way that will not negatively affect any life forms (either terra or aqua).
I have come across some information that this process is already being looked at.... it's called Osmotic Energy. http://exergy.se/goran/cng/alten/proj/97/o/
But, again, the web page states: "The major fact when it comes to the disadvantages is the high cost. Osmotic-produced power is much more expensive than for example fossil fuels. There are also engineering problems to be overcome."
Gee, we always come back to that little green demon (money)... big surprise. Money is a fiction created by man.... and a self-imposed limitation that will eventually lead us to our destruction... oh wait.. that's already happening... silly me, I forgot. (sorry for the sarcasm, but I really despise the entire backwards idea of currency on this planet)
*stepping unceremoniously off her soap box*
Anywho.... I still believe that the key to energy lies in our oceans (in one form or another
) Wish I was more proficient in molecular physics, so that I could devise a protype, but I don't think that's in the cards for me.... If things get to the point of Matrix-land, tho, I'll be in line behind CortexVortex! 
"Sometimes I wonder whether the world is being run by smart people who are putting us on, or by imbeciles who really mean it." ~ Mark Twain