methane

Those emissions would have a climate-warming impact roughly equivalent to 27 gas-fired power plants operating year-round, even if the flares burned every molecule of methane released from the wells.

That’s because one of the most common methods of producing it involves heating methane to release the hydrogen, which can also release nitrogen oxides and other pollutants in the process.

The decision forms the core of the federal government's authority to impose limits on carbon dioxide, methane and other greenhouse gases.

Hydrogen sulfide and methane seep out of faults - or cracks - in the Earth's crust.

“It also has methane and other molecules, including amino acids.”