a large amount of gas

The structure of the molecule of methane hydrate is such that it facilitates the capturing of a large amount of gas.

甲烷水合物的分子结构是这样的，即它促进了大量气体的捕获。

Considering the gas as energy, it should be high efficiency and low pollution, whose large amount of discharging into air would be a big waste of energy.

如果将瓦斯作为能源对待，它应该属于高效、低污染能源，假如大量排入大气，是一次能源的巨大浪费。

Especially during the rush hours, too many private vehicles move slowly on narrow roads, emitting a large amount of waste gas.

特别是在交通高峰期里，有太多的私家车在狭窄的道路上慢慢的移动，释放出大量污染气体。