沼气

zhǎo qì chí

沼气池

methane-generating pit

tí chàng zhǎo qì fā diàn

提倡沼气发电

advocate marsh gas power generation

fèi wu fǔ làn shí huì chǎn shēng zhǎo qì

废物腐烂时会产生沼气。

As the waste materials decompose, they produce methane gas.