In 2019 the waste sector was responsible for 1.5% of Ireland's Greenhouse Gas emissions
The waste sector includes emission estimates from solid waste disposal, composting, waste incineration (excluding waste to energy), open burning of waste and wastewater treatment and discharge. The largest of these sources is solid waste disposal on land (landfills) where methane (CH4) is the gas concerned.
Emissions from the waste sector decreased by 0.4% in 2019, with decreases in sub category landfills of 2.3%. Overall emissions decreased by 0.004 Mt CO2eq compared to 2018 emissions. Long-term decreases are a result of decreased quantities of municipal solid wastes (MSW) disposed of at landfills and a decrease in the proportion of organic materials (food and garden waste) in MSW as well as a diversion of paper products from landfills. Improved management of landfill facilities, including increased recovery of landfill gas utilised for electricity generation and flaring is also a big driver in decreased emissions from the waste sector.
Waste sector emissions are projected to decrease by 13.8% between 2020 and 2030 to 0.8 Mt CO2eq under the With Existing Measures scenario.