zhǎo​qì

marsh gas

沼气 (沼氣) zhǎo​qì
marsh gas noun
methane (CH4) produced by the anaerobic decomposition of organic matter, often found in marshes or produced in digesters

Many rural families use biogas for boiling water and cooking.

Frequency

Movie subtitles
0.480 per million appears in 0% of films
Written text
2.98 per million

Sources

Definitions
CC-CEDICT