The military sector is a substantial contributor to global greenhouse gas emissions, yet its carbon footprint remains one of the least scrutinised and disclosed. As governments and industries worldwide pledge net-zero goals, the defence sector’s environmental impact is emerging as a critical frontier in climate accountability. Growing calls for transparency and sustainable practices in military operations and supply chains are challenging the traditional secrecy and operational norms of defence organisations.
Did you know that global defence operations, from fuel-intensive military vehicles and aircraft to energy-demanding bases, generate emissions comparable to some mid-sized countries? Furthermore, the military’s extensive supply chains involve complex networks of contractors and suppliers with varying sustainability practices, amplifying the sector’s indirect emissions. Despite this, there has historically been limited public reporting or regulatory pressure on military emissions.
What is driving the push for transparency and greening of military supply chains?
Increasing awareness of climate risks alongside international climate commitments has highlighted the urgency of addressing emissions from all sectors, including defence. Civil society, investors, and some policymakers are demanding comprehensive carbon accounting and sustainable procurement within defence frameworks. Advances in emissions measurement and sustainability standards are making it feasible to track and reduce defence-related emissions. Furthermore, the strategic risks posed by climate change, including resource scarcity and geopolitical instability, are motivating defence institutions to align environmental stewardship with national security objectives.
How are these dynamics impacting the defence sector?
- Growing ESG expectations: Defence contractors and supply chain partners face rising scrutiny to demonstrate environmental responsibility and emissions reductions as part of broader ESG (Environmental, Social, Governance) criteria.
- Incorporation of low-carbon technologies: Militaries are investing in renewable energy, electric vehicles, energy-efficient infrastructure, and alternative fuels to decarbonise operations and bases.
- Enhanced reporting and accountability: Some defence agencies are beginning to publicly report emissions data and set carbon reduction targets, although disclosure remains patchy and non-standardised.
- Supply chain transformation: Efforts to green military procurement emphasise supplier sustainability certifications, lifecycle emissions assessments, and collaboration to lower the collective carbon footprint.
How can defence sectors and associated enterprises prepare to meet net-zero requirements?
- Establish systems for accurate emissions measurement: Implement robust carbon accounting methodologies covering direct and indirect military operations and supply chains.
- Integrate sustainability into procurement: Mandate environmental criteria in defence contracts and supplier evaluations to incentivise greener practices.
- Invest in innovation: Pivot towards clean energy technologies tailored for defence applications, including microgrids, electrification, and sustainable fuels.
- Enhance transparency and stakeholder engagement: Develop frameworks for public reporting and dialogue with civil society, policymakers, and environmental groups to build trust.
Strategy&Ops can provide support in navigating this complex climate challenge through comprehensive carbon footprint assessments, green procurement strategies, and technological transition roadmaps. Our multidisciplinary team bridges the gap between climate imperatives and defence operational realities, transforming sustainability risks into strategic opportunities. Contact our expert team at info@strategyandops.net to learn how.
#NetZeroDefense #MilitarySustainability #GreenSupplyChains #ClimateSecurity #ESGDefense #SustainableProcurement
References
Ambar Pramesti, L. & Suwanto (2025) ‘Why ASEAN’s coal promises keep colliding with reality’, Eco‑Business. Available at: https://www.eco-business.com/opinion/why-aseans-coal-promises-keep-colliding-with-reality/
Asia Natural Gas & Energy Association (ANGEA) (2025) ‘Discussion point: pragmatic pathways to coal phaseout in Asia by 2035’. Available at: https://angeassociation.com/discussion-point-pragmatic-pathways-to-coal-phaseout-in-asia-by-2035/
APEC Energy Working Group (2025) Conversion of Coal‑Fired Power Plants Using Energy Storage Systems: Experiences, Challenges, and Opportunities, March. Asia‑Pacific Economic Cooperation Secretariat. Available at: https://www.apec.org/docs/default-source/publications/2025/3/225_ewg-conversion-of-coal-fired-power-plants-using-energy-storage-systems.pdf?sfvrsn=3dc5e344_1
Dong, W. (2025) ‘Parting the fog of war: Assessing military greenhouse gas emissions’, [Journal]. Available at: https://www.sciencedirect.com/science/article/pii/S2214790X25000437
Energy Tracker Asia (2025) ‘Energy transition in Asia‑Pacific’, EnergyTracker.Asia. Available at: https://energytracker.asia/energy-transition-in-asia-pacific/
Green Central Banking (2025) ‘Indonesia sends mixed messages on coal phaseout’, GreenCentralBanking, 13 May. Available at: https://greencentralbanking.com/2025/05/13/indonesia-sends-mixed-messages-on-coal-phaseout/
Kinney, E. (2024) ‘Guest article: CCPI x Military Emissions Gap – How Military Emissions Impact Global Warming’, CCPI Blog. Available at: https://ccpi.org/guest-article-ccpi-x-military-emissions-gap-how-military-emissions-impact-global-warming/
Peh, G. (2025) Mapping coal phaseouts in key Asian markets. Institute for Energy Economics & Financial Analysis (IEEFA). Available at: https://ieefa.org/resources/mapping-coal-phaseouts-key-asian-markets
Shakdwipee, M., Mammadov, E. & Giese, G. (2025) Simulating a Managed Phaseout of Coal‑Fired Power Plants in the Asia‑Pacific Region. MSCI Sustainability Institute. Available at: https://www.msci-institute.com/wp-content/uploads/2025/03/Simulating-a-Managed-Phaseout-of-Coal-Fired-Power-Plants-in-the-Asia-Pacific-Region.pdf
“PPCA at CEM16 recap” (2025) PoweringPastCoal.org. Available at: https://poweringpastcoal.org/news/ppca-at-cem16-recap/
TNI – Transnational Institute (2025) Climate Collateral: Why the military’s impact on climate change can no longer be ignored. Available at: https://www.tni.org/en/publication/climate-collateral-2pagebriefing
Transform Defence (2025) ‘New data reveals the Military Emissions Gap is growing wider’, Conflict & Environment Observatory. Available at: https://ceobs.org/new-data-reveals-the-military-emissions-gap-is-growing-wider/
Greenly (2025) ‘Rearming Europe: Counting the Carbon “Bootprint”’, Leaf Media by Greenly. Available at: https://greenly.earth/en-us/leaf-media/data-stories/rearming-europe-counting-the-carbon-bootprint
De Pasquale, T. (2025) ‘How Are Wars Affecting Climate Change?’, ClimaTalk, 15 September. Available at: https://climatalk.org/2025/09/15/how-are-wars-affecting-climate-change/