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Solution


Q.

Hydrogen is labelled ‘brown’ if the manufacturing process releases both carbon dioxide and carbon monoxide to the air.

In what way is the manufacturing process of brown hydrogen WORSE than that of grey hydrogen for the environment
1 It releases into the atmosphere a gas that directly causes a greenhouse effect.  
2 It releases into the atmosphere carbon which was stored for millions of years.  
3 It releases into the atmosphere a gas that is toxic to human beings.  
4 It releases into the atmosphere gases that cause acid rain.  

Ans.

(1)

Brown hydrogen is produced by gasification, where carbonous materials are heated into a gas. This extraction process involves turning coal into gas and produces large quantities of carbon emissions that are released into the atmosphere leading to the formation of greenhouse gases responsible for ozone depletion.