The agricultural emissions paradox: Measuring national power beyond CO2 in the climate era

Traditional measures of national power capture military and economic mass but omit the environmental and energy-transition capabilities that increasingly shape international influence. This article introduces the Green National Power Index (GNPI), combining economic-demographic capabilities with green energy capacity, environmental performance, and carbon efficiency for 89 countries over 2000–2023. Two features distinguish the index: it includes the three major greenhouse gases (CO 2 , CH 4 , and N 2 O) using IPCC Sixth Assessment Report global warming potentials, and it measures renewable energy through modern renewables only, excluding the traditional use of biomass. The index reflects latent, structural green power rather than realized influence. Green power is uncorrelated with income and weakly inversely related to conventional power: Costa Rica, Norway, and Sweden rank highest, while China, India, and Russia rank low. Adding agricultural greenhouse gases shifts the hierarchy, moving Brazil from 4th to 7th and revealing an “agricultural emissions paradox”: clean-electricity countries rank lower because of non-CO 2 emissions from agriculture. The penalty is conditional on a clean energy system rather than a mechanical consequence of broader accounting. In panel regressions, the association between per-capita CO 2 and the index survives removing all emission indicators from the dependent variable, and a sectoral decomposition shows that agricultural methane never raises the index; a positive coefficient on total methane reflects fugitive fossil-fuel emissions, not agriculture. Conditional on income and trade size, the index predicts specialization in clean-technology exports. Climate-governance and trade-related assessments should weigh methane and nitrous oxide alongside carbon dioxide, particularly for agricultural economies.