Hydrogen marketplace
Hydrogen is touted to be the fuel of the future, powering transport, replacing natural gas and even generating electricity (thereby adding yet another level of inefficiency). It is currently used in:
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Gas welding
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Automobile fuel, fuel cells
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Ultraviolet lamps
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As a reducing agent
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Chemical analysis
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Structural identification
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In gas chromatography
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In balloons
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Rocket fuel for space programs
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Hydrogen bombs