氢怀疑论者不仅指出了与氢制造、运输和存储相关的巨大的投入成本，也指出了可靠得多的替代能源的可能性。
Hydrogen sceptics point out not only the large capital costs associated with the production, transportation and storage of hydrogen, but also the availability of far more viable alternatives.
研究组还研究了运输及发电领域改造的可能性，包括鼓励在伦敦、印度德里使用自行车或徒步。
The team also assessed scenarios in the transportation and electricity generation sectors, including increased cycling and walking in London and Delhi, India.
这种可能性的确存在(比如运输垃圾)，但是这是典型的纸上谈兵。
Such possibilities exist (in the shifting of waste, for example) but these are typically over-egged.
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