Here is a presentation about free energy.
What is free energy? Is it really for free?
The most known types of free energy are solar, wind and geothermal energy.
It can’t be of zero cost since installation of equipment is expensive.
Free Energy in Science are resources that won’t end since it is renewable.
Energy can’t be created but transformed. If there is energy loss, there is a need to replenish it.
There are free energy devices which produces energy from natural resources like generators.
An example of free energy is hydrogen. It is an abundant element and environmental friendly.
Let’s pay attention to our planet and take good care of it since some of our energy resources are diminishing.