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With the new hydrogen tablet, it becomes much simpler to use the environmentally-friendly energy of hydrogen. Hydrogen is a non-polluting fuel, ...

Not correct. Burning hydrogen creates water vapor, which is the number one greenhouse gas.

[BillM]

There will be little more water vapor generated than there is now burning hydrocarbon fuels. There will be biological sources that can generate ammonia form waste as well as vegetable matter. The processes will involve genetically modified or constructed organisms.

We are not far from this if we work hard at it and $60 oil is a heck of a prod.