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Energy through gravity?

I know that this question has been dealt with before.

But I'm going to ask it in a different manner:

If we look at all the planets, stars, asteroids, galaxies and so on.
They are all somehow under the control of gravity.
If it is gravity that makes them move in their respective way,
is not then gravity a force by itself? And thereby, there is a source of energy behind that force?

My question/idea is simple: If everything in the universe is put in motion by gravity, shouldn't there be a way for us to "harness" that force and energy?
Can you imagine the amount of energy we could use?

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    Feb 10 2014: Do you mean we can do something with what we detect as the universal gravity forces in space?

    Gravity has been used on earth, intentionally or instinctively in all digging, processing and constructing. (We know- Gravity is an unavoidable force of nature keeping our bodies and our homes in one piece, at least for awhile.)

    But I have this very specific question, before one thinks about where to get more energy - can one explain:

    WHY DO WE NEED SO MUCH MORE ENERGY WHILE WE WASTE AND MISUSE SO MUCH ENERGY ALREADY AND QUITE STUPIDLY?


    Can we rethink our Reasons? Do we need to increase traffic, mass-produce more junk products, build more fancy "defencive" war-toys, fill the skies with more jets?

    Innovative systems, which can intelligently support our sustainabily, are already available, sustainable heating and cooling, water and sewage systems, as well as production of earth friendly materials and textile, and some technology that is not harmful for organic gardening and safe environment... this list is ENDLESS.

    I think what we REALY desperately need is to re-design and drastically change our urban infrastructure, road systems, and decrease dependency on major suppliers, therefore, illiminate heavy commercial traffic in residential areas and across the country.

    Learning about sustainability would not cost us a fortune - this will create meaningful and greatly rewarding new jobs, and inspiration for the young.

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