地热能有诸多优点：不产生二氧化碳，如果正确使用且持续可用的话地热能是可再生的。
Geothermal power has a lot of advantages: no CO2 emissions, renewable if used correctly and constantly available.
尽量骑自行车或乘坐公共交通上学而不坐小汽车，因为它会产生更少的二氧化碳。
Try to take bicycles and public transportation to school instead of cars because it will make less CO2.
这意味着汽车不直接产生二氧化碳排放，但是否完全零排放取决于用来制造氢的能量原料。
This means the car produces no CO2 emissions directly, but whether it is emission-free overall depends on the source of the energy used to produce the hydrogen.
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