On Earth, a class of bacteria known as methanogens breathes out methane as a waste product.
How intense is methane as a heater of the atmosphere compared with carbon dioxide?
When animals and other organisms eat food they produce methane as a waste gas.
"People have described UK Methane as a company of two guys in a broom cupboard," she says.
On Earth, many bacteria associated with peat bogs, rice paddies and ruminant animals produce methane as a metabolic byproduct.
On Earth many microbes release methane as a waste product that mixes in the atmosphere with substantial contributions from cows, pigs, and humans.
Increasingly, municipal plants are viewing methane as a beneficial by-product of solids processing, and they are capturing the methane to be used on-site.
"Contamination of ground and water can occur as a result of contaminants percolating up from the fractured shale seam into an aquifer, as well as leakages of methane as a result of well failure.
Campaigners saw the curbs on methane as a chance to cap one of the fastest growing sources of climate pollution in recent years – because of the boom in oil and gas drilling.
These are the books that I predict will be read in 2114 — on Mars, perhaps, by whatever creatures produced that recent puff of Martian methane, as a record of what earthly hearts contained.
The microbes use the hydrogen for fuel and the methane as a source of carbon, making them completely independent of the photosynthetic microbes and plants living at the Earth's surface.
