For discarded materials that cannot be renewed, our modern landfill facilities are well-designed, well-run, and well-equipped to provide environmentally safe and secure disposal. Across the northeast, we operate nine municipal solid waste landfills and one construction debris landfill. We design, build, and operate these facilities to minimize the impact of non-recycled solid waste on the environment, both locally and globally.
Since our last report, we have continued to invest in the environmental protection systems at our landfills. From 2014 to 2017, we added a net increase of 40 acres of landfill liner, 178 new gas collectors (including horizontal lines and vertical wells), and 41 acres of landfill cap. We invest annually in the upkeep of our gas collection systems.
As a result of these investments, we continue to reduce emission rates at our landfills. Between 2010 and 2017, we reduced our greenhouse gas emission rate from 245 down to 131 kilograms per ton disposed. This is a 46% reduction in the rate of emissions from our landfills.
The 2018 event attracted over 1,000 visitors, who were treated to a full facility tour, a scale model of the liner system, and the opportunity to ask any questions they may have about the operation. They saw the site's innovative landfill-gas-fueled maple sugar shack and their beautiful pollinator research garden. Visitors also enjoyed lawn games, a bounce house, delicious barbecue, and educational booths.
Our open house events are a fun, family-friendly way for the community to learn what happens to their waste. This awareness helps to build mutual trust, communication, and ongoing thoughtful discussion about the future of solid waste management in our communities.