One of the world's busiest airports is looking to become one of the world's greenest.
France's main airport, Paris Charles de Gaulle, handles more than 60 million people a year and its owner-operator, Aéroports de Paris, has set ambitious green targets for CDG and its other airports and airfields in the Paris region.
These include a commitment to cut 'internal CO2 emissions' by a quarter compared to 2009 levels, improved management of rainwater, as well as cutting paper consumption by five percent compared to 2010.
The stakes are high: according to Ademe, France's Environment and Energy Management Agency, the electricity consumed at CDG alone is roughly equivalent to a city of 125,000 people.
One key initiative at CDG is the installation of a biomass plant that has two wood-fired boilers, which meets around a quarter of the airport's heating needs "without releasing fossil-fuel CO2 emissions," according to Aéroports de Paris.
Installed in 2012, the boilers burn 80 tons of woodchips every single day. The wood is sourced from forests surrounding the airport.