NATO's 5% GDP Target Collides With Its Own Climate Goals

At the June 2025 Hague Summit, NATO allies agreed to invest 5% of GDP annually in defense and security by 2035, more than double the alliance's prior 2% guideline. At least 3.5 percentage points must go to core defense requirements, with up to 1.5 points allowed for broader security-related spending such as critical infrastructure and industrial base investment. The Atlantic Council estimates the shift requires roughly $1.9 trillion in additional annual spending across the alliance once fully phased in.

Scientists for Global Responsibility (SGR), a UK-based science and technology advocacy nonprofit, published a report in July 2026 arguing that this spending surge sits on a collision course with military climate commitments. The report is an advocacy analysis rather than a peer-reviewed study, but it draws on a review of 11 published research papers to estimate that every $100 billion increase in global military spending corresponds to roughly 32 million tonnes of additional carbon dioxide equivalent emissions.

Only Seven of the Top 15 NATO Spenders Have Explicit Emissions Targets

Of the 15 largest military spenders in NATO, SGR found only seven, Belgium, Canada, France, Germany, Norway, Romania, and the UK, have set explicit greenhouse gas reduction targets, while two more (the Netherlands and Denmark) have set fossil fuel reduction goals instead. The United States abandoned its Defense Department emissions targets in 2025. Most existing targets cover only stationary emissions from bases and buildings. Mobile emissions, the kind that come from aircraft, ships, and land vehicles, are the ones most exposed to a spending expansion, and they largely sit outside those targets.

SGR's standardized comparison found that, once incomplete coverage and long timeframes are factored in, only Ireland and Slovenia are on a path consistent with net zero core emissions near 2050. Germany, France, and Canada extrapolate to net zero between 2096 and after 2200 on current trajectories. For finance and procurement teams tracking defense-adjacent suppliers, that gap between headline target and effective target is a due-diligence signal worth checking before treating a supplier's climate claims at face value.

NATO's Own Climate Target Doesn't Cover the Militaries Doing the Spending

NATO itself announced a target in 2022 to cut emissions 45% by 2030 and reach net zero by 2050, covering the "NATO Enterprise," meaning buildings, aircraft, and ships the organization directly owns. That target excludes the national militaries of all 32 member states, which account for the vast majority of the alliance's actual spending and emissions. SGR notes NATO has not published a total emissions figure for the Enterprise, and the target no longer appears on the relevant section of NATO's website, raising questions about whether it remains active.

Separately, Norway is the only NATO member conducting extensive monitoring of Scope 3 supply-chain emissions. Its data shows those emissions can exceed 80% of a military's total footprint, and they rose again as spending picked up in recent years. For procurement and finance teams evaluating defense-industrial suppliers, that's the number nobody else in the alliance is even trying to track.