2. What is methane and why is this gas an environmental concern?

Methane is the principal component of natural gas. The relative abundance of methane makes it an attractive fuel. However, because it is a gas at normal temperature and pressure, methane is difficult to transport from its source. It is generally transported in bulk by pipeline in its natural gas form.

Methane is produced when biomass is digested by bacteria in the absence of air.

Methane is a greenhouse gas that remains in the atmosphere for approximately 9-15 years. Methane is over 20 times more effective in trapping heat in the atmosphere than carbon dioxide (CO2). This is why methane is considered a significant and harmful greenhouse gas.

Sources of methane: