Antares Nebula
Active Member
All true, but direct solar energy (via solar panels of some kind) will prove to be the most cheapest and safest form of energy -- it's getting better every year. Almost all other forms of energy (fossil fuels, wind, tides, etc.) are derived from solar/sun, and therefore are secondary, less efficient sources than direct sunlight. Exceptions include deep earth thermal energy (derived from earth's hot core) (probably will never be as efficient as solar), and nuclear energy (has much higher safety risks than solar).If that is what you consider free of charge, there are numerous other natural sources of energy such as wind, geo-thermal, tidal flows, the run of rivers, gravity, radioactive isotopes and even hydrocarbons. All those sources lay fallow until someone spends money to harness natural energy into a useful form, capable of performing work and improving the quality of human life.
Disagreements and controversies revolve around how much is the relative "charge" for using energy from any given natural source and how such "charges" should be allocated among society.
For this reason, the energy future will be dominated by solar tech. Solar panels today. Integrated solar film/tech in the future, like Tesla Solar Roof Tiles. Solar tech will eventually be integrated into a variety of building materials and will become seamless with architectural structures. I believe Tesla will lead this effort, with their solar roof tiles being the start of a new generation of solar products.
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