但有人怀疑天然气是否真得就那么清洁环保。
But some question whether natural gas is really as green as all that.
天然气作为一种清洁环保的能源，需求量越来越大。
Natural gas is a clean energy source with increasing demand in the worldwide.
尽管对于风力发电也有反对者，但是如果风能可靠的话，那么其清洁环保的特点足以赢得广泛的支持。
Though wind power has its opponents, too, its environmental virtues might be enough to swing things in its favour if it were also reliable.
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