0 a gas with no smell or colour, often used as a fuel -- 甲烷，沼氣
Methane is the main constituent of natural gas. 甲烷是天然氣的主要成分。
If methane is a causal mechanism, the repetition of the negative carbon excursions could be accounted for by multiple releases of methane.
If the biosphere emits less methane when cooler, the feedback would be stabilizing.
The same can also be said of near-stoichiometric fuel-air mixtures with very insensitive fuels such as methane.
The methane content in the mixtures varied from 2 to 10 % according to the latest estimations for this molecule in the satellite's atmosphere.
The release of methane from gas hydrate sources is also an unsatisfactory explanation.
This alternative process does not restrict the methane's age to 430 years, because clathrate hydrates can preserve methane of ancient origin for long time periods.
A comparison of systems for measuring methane emissions from sheep.
This includes, in particular, polar solvents like ammonia, hydrocyanic acid, and methanol, and possibly non-polar compounds such as methane and ethane.
