Landfill gas is a mix of methane and carbon dioxide. Methane is a flammable toxic green house gas twenty times more damaging to the climate than carbon dioxide. Instead of going in the atmosphere and becoming a green house gas that's harmful to the environment, it can be collected in every landfill and used to produce renewable energy.

Landfill gas farming and valorisation is a major component in the reduction of greenhouse gas emissions. Those landfills equipped with Veolia’s gas collection and treatment systems have seen their waste storage increased by 20% in the last 5 years.