Question

Hydrogen fuel still results in pollution because _____. hydrogen is converted into carbon dioxide electricity is required to produce the hydrogen fuel used hydrogen creates ozone it contaminates water sources

Answer 1

Your answer would be electricity is required to produce the hydrogen fuel. 

Answer 2

The answer is B: electricity is required to produce the hydrogen fuel. This could still be polluting because much electricity is produced using fossil fuels. However, this question is a bit misleading. If electricity used to manufacture hydrogen is sourced from renewable energy, such as hydropower, solar or wind energy, then hydrogen power in turn is also not polluting.