Hydrogen economy
A hydrogen economy is a hypothetical future economy in which the primary energy used for automobiles and other vehicles as well as creating electricity comes from hydrogen and renewable energy sources, like windmills and solar panel.
Purpose
The reason to use this is to replace the use of petroleum. It would also stop the use of fossil fuels which causes carbon dioxide along with many other greenhouse gases, such as carbon monoxide and methane, to be created. These float up into the atmosphere, damaging it. This is bad for the ecology.
Hydrogen Economy Media
Hydrogen has the most potential to reduce greenhouse gas emissions when used in chemical production, refineries, international shipping, and steelmaking
Technology leadership opportunities in green hydrogen value chains according to the International Renewable Energy Agency in 2022: Script error: The function "hyphen2dash" does not exist. 
Some projected uses in the medium term, but analysts disagree
Hydrogen fuel requires the development of a specific infrastructure for processing, transport and storage.
A NASA engineer sweeps an area with a corn broom to find the location of a hydrogen fire. Hydrogen burns with a nearly-invisible flame.
A Mercedes-Benz O530 Citaro powered by hydrogen fuel cells in Brno, Czech Republic
