By Kate Porter, CBC News Ottawa, December 28, 2018
The City of Ottawa has managed to dramatically reduce the greenhouse gases emitted from garbage at the Trail Road landfill in recent years, but it's still finding it a challenge to eliminate those emissions entirely.
Garbage gives off gases as it decomposes, roughly half methane and half carbon dioxide, explained Marilyn Journeaux, director of solid waste at the city.
The city has drilled more than 100 wells into the garbage to vacuum out those gases so they can be converted to electricity or flared off, said Journeaux.
https://www.cbc.ca/news/canada/ottawa/ottawa-landfill-greenhouse-gas-emissions-1.4952239