$15.2B ($15.2 billion)

The USD 15.2 billion figure is an indicative estimate of the global compressed biogas — or biomethane — market value in a recent reference year (commonly the early 2020s, with variation across analyst reports). It is the kind of headline number that anchors the opening pages of feasibility studies and investor decks, contextualising the scale of the addressable opportunity for a single project against a global industry.

The figure aggregates several components. Production value: total volume of biomethane and CBG produced globally — currently around 5-6 billion cubic metres per year of biomethane, dominated by Europe (Germany, UK, France, Netherlands, Denmark together account for over 60%), with growing contributions from the United States, India and China. Equipment and EPC value: digesters, upgrading plants, compressors and ancillary infrastructure built and sold globally each year. Service revenue: O&M contracts, feedstock supply chains and digestate handling. The mix is roughly 65% production value and 35% equipment plus services, though the split varies by analyst methodology.

For Indian CBG developers the global market size is meaningful in three ways. Equipment sourcing: the global market funds R&D and scale economies at vendors like MAN, Wärtsilä, Greenlane, Bright Biomethane, Pentair Haffmans, whose technologies are available to Indian projects at international price points. Best-practice benchmarking: European operating data on yields, uptime and digestate quality provides reference points for Indian project assumptions. Investor appetite: international climate and infrastructure funds size their India CBG allocations against the global biomethane opportunity, treating India as a fast-growing share of the world total.

The cautions are familiar. The USD 15.2 billion figure is an aggregation by analysts with different methodologies — IEA, BloombergNEF, Grand View Research, IMARC and others report numbers that vary by 30-50% for the same year. It is a snapshot of the past year, not a guarantee of next year's number. It is global, so the addressable share for an Indian developer is bounded by India's policy environment, feedstock base and demand pull. The figure should be read as scale-setting context, not as a market that any single plant can claim a percentage of.