科學問題science question(english)

Only water is produced as the only product.
equation
2H2+O2->2H2O
advantage:
1.burning hydrogen produce only water and cause no pollution
(compare to commonly-used fossil fuels which usually burn to form carbon dixoide, burning hydrogen is very clean!)
2.hydrogen is abundant on the Earth, we can get hydrogen from electrolysis of water which is very abundant on Earth. We don't need to worry the source of hydrogen.

disadvantage
1.hard to store and transport
hydrogen gas is reactive and burns in air with a small explosion, also, hydrogen is gas at room condition, transporting gases is not easy and very expensive!

2012-03-10 15:26:02 補充：
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Only water is produced as the only product.
equation
2H2+O2->2H2O
advantage:
1.burning hydrogen produce only water and cause no pollution
(compare to commonly-used fossil fuels which usually burn to form carbon dixoide, burning hydrogen is very clean!)
2.hydrogen is abundant on the Earth, we can get hydrogen from electrolysis of water which is very abundant on Earth. We don't need to worry the source of hydrogen.

disadvantage
1.hard to store and transport
hydrogen gas is reactive and burns in air with a small explosion, also, hydrogen is gas at room condition, transporting gases is not easy and very expensive!