> The scientists said gray, black, and brown hydrogen release 9 to 12 tons of carbon dioxide for each ton of hydrogen produced. Yet, they correspond to 95% of a

> The scientists said gray, black, and brown hydrogen release 9 to 12 tons of carbon dioxide for each ton of hydrogen produced. Yet, they correspond to 95% of all hydrogen currently produced worldwide for agricultural and industrial needs. Even if this green hydrogen does not help move a vehicle, it is a welcome way to curb the production of the gray and black kinds. It will only do that if countries put laws in place to require green hydrogen. green hydrogen is not just expensive because it is new, but theoretically expensive because there are currently two routes to turn natural gas into hydrogen: gas -> combined cycle gas turbine (40% loss) -> generator -> electricity electricity -> electrolysis (10-50% loss) -> hydrogen gas -> steam reforming (25% loss) -> hydrogen. From this, you can make equations bounding the prices of gas, electricity, and hydrogen for any process to be profitable. It turns out that for the middle process to work out economically, the first must be non-economic. ie. the price of electricity must be very low while the price of gas is very high. With gas just flowing out of the ground in the USA, russia, saudi arabia, and others, this will never happen. In fact, in many places the price of gas is so low we just burn it off because it isn't even valuable enough to collect or transport.