Low-Carbon Technologies: Waste Management Across All Regions

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Waste is a small contributor of GHGs.  Approximately 3-4% of anthropogenic GHG emissions are caused by waste or wastewater.  The primary GHG emitted by waste is methane.  Of global methane emissions, about 18% (or 105 Mt/yr) come from waste, so waste is a significant contributor of anthropogenic methane emissions.  Technology for mitigating GHG emissions from waste are considered “mature” by the IPCC, so mitigation policies should be very effective.  There are still a number of promising new technologies, however, that may reduce GHG emissions further.  Additionally, methane emissions might be recaptured for use as a renewable energy source.  It should be profitable to reduce methane emissions by 20-30% by 2030.  A reduction of 30-50% by 2030 would cost less than $20 per tonne CO2eq/yr.