Many industries use heat-intensive processes that generally require the burning of fossil fuels, but a surprising green fuel alternative is emerging …
The future of energy
As the world moves away from fossil fuels, there's a few surprises in the future energy mix.

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Gravitricity has broken ground on a demonstrator facility for a creative new system that stores energy in the form of “gravity” by lifting and dropping huge weights.
A team from Australia's RMIT University says it's figured out a cost-effective way to produce hydrogen using wastewater and sewage.
The CRYOBattery uses a cryogenic cooling technology to turn ambient air into liquid, which can then be used to store and release energy over long periods of time.
Lancaster, California will be home to a "greener than green" trash-to hydrogen production plant three times the size of any other green H2 facility.
Some bacteria are known to produce their own electricity, which could make them useful in batteries and fuel cells.
The idea of converting organic household waste into energy for cooking is certainly an appealing one, and Israeli company HomeBiogas is out to make this a more realistic proposition.
This surprisingly simple new energy storage system is built around blocks that store thermal energy like melted chocolate chips in a muffin.
Using electrical storms as a jumping off point, scientists at Tel Aviv University believe they may have uncovered a new source of renewable energy.
The International Thermonuclear Experimental Reactor is one of the most ambitious energy projects humankind has ever undertaken