Question

select all the correct answers.
which of these factors make hydrogen fuel cells a better option than burning fossil fuels?
hydrogen fuel cells have a higher energy efficiency.
hydrogen fuel cells create less pollution.
burning fossil fuels relies on outdated devices and technology.
hydrogen is the most abundant element in the universe.
hydrogen fuel cells are more expensive than fossil fuels.

Explanation:

• For "Hydrogen fuel cells have a higher energy efficiency": Fuel cells convert chemical energy to electricity more efficiently than burning fossil fuels (combustion has energy losses as heat, etc.).
• For "Hydrogen fuel cells create less pollution": Burning fossil fuels emits pollutants like CO₂, SO₂, NOₓ; fuel cells produce mainly water (if using H₂ and O₂), so less pollution.
• For "Hydrogen is the most abundant element in the universe": Abundance means a potentially sustainable and widely available fuel source, unlike finite fossil fuels.
• "Burning fossil fuels relies on outdated devices and technology" is incorrect (fossil fuel tech is still evolving/used, and the question is about fuel cell advantages, not tech age). "Hydrogen fuel cells are more expensive than fossil fuels" is a disadvantage, not an advantage for being better.

Answer:

A. Hydrogen fuel cells have a higher energy efficiency.
B. Hydrogen fuel cells create less pollution.
D. Hydrogen is the most abundant element in the universe.