One thing that most people seem to over look is that one of the biggest greenhouse gasses in the atmosphere is H2O. Water vapor is responsible for holding in alot of our heat. So if we stop adding CO2 to the air but still keep pumping out the watervapor (which is a by product of hydrogen powered cars) we will still be putting a greehouse gas into the atmosphere. How this will affect our atmosphere and global temps, who knows?
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One thing that most people seem to over look is that one of the biggest greenhouse gasses in the atmosphere is H2O. Water vapor is responsible for holding in alot of our heat. So if we stop adding CO2 to the air but still keep pumping out the watervapor (which is a by product of hydrogen powered cars) we will still be putting a greehouse gas into the atmosphere. How this will affect our atmosphere and global temps, who knows?