Landfill sites in Gelderland release roughly 1.2 Mton CO₂-eq per year, and about 87% of that consists of methane. This methane is formed because organic material in landfilled waste breaks down without oxygen, a process that releases a powerful greenhouse gas.
Within the industry and business sector, landfill sites are by far the largest source: virtually the entire non-energy sector emission can be traced back to them. Notably, the Gelderland Climate Plan does not name landfill sites separately, while the largest non-energy emission sits precisely there. Because the methane share is so high, the analysis focuses on capturing landfill gas and on limiting the organic material that reaches the landfill. Source: Climate Action Recap Gelderland (industry and business sector analysis), New Economy.