Net-zero on paper, flat emissions on the chart

For most of the last decade, the world has been writing climate ambition into law at a pace that would have seemed implausible in the 1990s. The Paris Agreement, adopted by 195 Parties at COP21 in December 2015 and in force since November 2016, created a binding framework of national commitments and a temperature goal of well below 2C. The European Union enacted a legally binding Climate Law in 2021, fixing net-zero by 2050 and a 55% cut by 2030 into regulation. The United States passed the Inflation Reduction Act in 2022, directing roughly $369 billion toward clean energy. And in 2020 the world's largest emitter pledged carbon neutrality before 2060. Together these strengthen what the Factrail causal graph models as the decarbonization and climate-mitigation policy driver, whose normalised intensity has climbed from about 0.12 in 1995 to roughly 0.62 today.

What the chart actually shows. Despite that accumulating policy weight, the welfare indicator the driver is meant to bend — global CO2 emissions per capita — has stayed essentially flat. Our World in Data's World series, built on the Global Carbon Budget, places per-capita emissions at 4.74 tonnes in 2010, 4.74 in 2015, and 4.73 in 2024. The figure dipped to 4.46 in the pandemic year 2020 and then climbed back. Against Factrail's analytical normal line of about 2.3 tonnes — a per-capita level often cited as consistent with the Paris range — the world sits at roughly double a sustainable footprint, and the deviation has not narrowed.

Why the gap is real, not a measurement artefact. The Factrail model links the policy driver to the indicator with a weakening (downward) effect, but at moderate strength and with a multi-year lag — roughly five years in the graph's parameterisation. That encodes a well-understood dynamic: laws set targets, but capital stock, power plants and vehicle fleets turn over slowly, and emissions reductions in legislating blocs can be offset by growth elsewhere. A binding 2030 EU target or a 2022 US investment law does not register in a single global annual data point; it bends a long curve gradually. The flatness of the line over 2010-2024 is therefore consistent with policy that is real but young relative to the lag.

Plausible alternative explanations. Several non-policy factors could keep the line flat independently. Continued growth in fossil-intensive energy demand across fast-developing economies can absorb gains made elsewhere. Pledges differ sharply from delivery: China's 2060 commitment is carried in the dossier as needs_review precisely because it is forward-looking and its execution is contested. And the policy-intensity series itself remains well below full global coverage at 0.62, meaning the driver is strengthening but far from saturated. A secondary pressure — tropical deforestation — also adds carbon, partly offsetting mitigation, though the global per-capita series is dominated by fossil emissions.

Who and what is involved. The institutional actors are concrete and well-sourced: the UNFCCC convened and administers the Paris regime, and the European Commission proposed and implements the Climate Law. The individual political actors — the signatories and announcers of these commitments — are the named heads of state in the underlying facts.

What may come next. Factrail's reading is not that policy has failed but that the lag is still running. If binding policy continues to strengthen, the model expects the per-capita line to begin a slow, shallow decline later this decade rather than a sharp break. The contrast with a faster-moving environmental story — the Amazon's enforcement-driven deforestation reversal, covered separately — shows that some welfare curves can turn quickly when a single driver responds to political will, while a globally aggregated indicator like per-capita CO2 changes only at the pace of the whole energy system.

Sources. The conclusions here rest on the Our World in Data per-capita series (Global Carbon Budget), the UNFCCC Paris Agreement record, the European Commission and IEA on the EU Climate Law, and US government documentation of the Inflation Reduction Act, all carried in the dossier as high-credibility, URL-verified entries.