Much has been discussed over the subject of "free energy" because this definition is supposed to stand for energy that can be directly extracted from atmosphere and in vast quantities, without affecting the environment. The debates have concentrated over whether free energy exists or not and how much it would cost to be used for large scale production; also, controversy has arisen over the terms abundant and efficient; how much do you need to be abundant? How much do you need to become efficient? The potential in research in this area needs to be exploited to its full maximum, therefore new things need to be uncovered before using free energy.

The term "free energy devices" has been coined to serve for multiple purposes. People use this term to describe a device used to collect and transmit energy from one source to another; it is also used to describe something that collects energy without requiring any fees or even to name machine with perpetual motion. Though it is needless to say, recall that the machine that produced perpetual motion by using only energy produced by itself was and is fiction, an impossible concept to put into practice. There is no possible machine on earth that is capable of being turned on and then starting to produce its own energy until infinity, without using any resources from the exterior. Technology, however, has advanced over the course of time and new ones have replaced the old technologies, thus giving rise to more efficient devices and less energy consuming approaches.

Nonetheless, no one can until now, come up with the technology to exploit all the free energy in the space and this idea is also something that hasn't been put into practice until now. Therefore, we needed to exploit the potential of atoms to create huge energy amounts. This fact become possible in the '40s when nuclear power proved to all that we can create incredulous amounts of energy. Flying was also fiction until the Wright Brothers were able to fly for the first time at the beginning of the twentieth century.

Those who support the ideas of "free energy" argue that mankind can utilize large amounts of energy coming from the Field named Zero Point. This represents the states where a defined system enters the mechanical state and then reaches a point in which the lowest energy points is located. Otherwise known as the "ground state", the Zero Point Energy is also known as "residual energy" because you are using an alternative to generate energy. This idea was initially coined by Albert Einstein together with Otto Stern.

This idea is also used to refer to vacuum energy, when studying quantum mechanics for instance. It is utilized in expressing the idea of empty space. The energy field generated inside the vacuum is attributed to the base of waterfall, according to the idea of one of those who proposed the idea, Hal Puthof. Puthof gives an explanation for the zero point, which basically means that provided that the universe is frozen completely, the energy from zero point would still remain there. Even so, it is not quite well known whether these implications are merely derived from the fact that this belongs to quantum physics or whether this is the consequence of another phenomenon. Therefore, finding the reservoir for such a big amount of energy is extremely difficult to do and there are also question on how gravity or inertia affect this side of the discussion.

These questions remain to be answered and they generate a lot of interest along the academia because they prove to be enticing challenging to an ever changing world, where finding the right resources of energies would insure the survival or the demise of the environment. Therefore, mankind needs to make some progress in the category of energy and be able to realistically advance with research. New engineering solutions might be coined in the future to help with the emission rates concerning atoms, molecules, laser research and other potential, interesting topics.