On a celebratory night in late 2016, the Arc de Triomphe and the Eiffel Tower were lit up in green to remind the world to implement the Paris climate agreement. Yet in recent years, climate legislation in the United States has been stuck at a red light, most recently because Joe Manchin, a conservative-leaning Democratic US Senator from West Virginia, single-handedly made a hostage of America's commitment to the Paris agreement's decarbonisation targets.
But now, after previously striking a lethal blow to US President Joe Biden's $2 trillion Build Back Better Act -- the most ambitious climate legislation in US history -- Mr Manchin has come around in support of a modest substitute bill that will include hundreds of billions in federal funding to support the clean-energy transition. At a time when extreme weather events are ravaging many parts of the world, the compromise package comes as a big relief. But it is also somewhat disappointing for a beleaguered Democratic Party that is still reeling from the Supreme Court's reversal of Roe v Wade, and for an American electorate that is increasingly anxious about climate change.
Efforts to establish a global climate-policy governance regime have taken a long, zigzagging path, passing through 26 annual "conferences of parties" (COPs). The process got off to a promising start, in 1988, with the creation of the Intergovernmental Panel on Climate Change, the world's premier climate-science entity. And that was soon followed by the 1992 Rio Earth Summit, where 178 countries adopted the UN Framework Convention on Climate Change.
But the UNFCCC imposed no binding requirements, and at the 1997 Kyoto Conference, the first attempt to mandate specific emissions reductions in global climate talks hit a roadblock, after the US Senate refused to ratify the Kyoto Protocol, declaring it "dead on arrival".
By the time that 196 parties to the UNFCCC approved the Paris accord, in late 2015, the world had already crossed the 1° Celsius warming threshold. Nonetheless, with its central goal of limiting global warming to well below 2°C, and preferably to 1.5°C, the Paris agreement marked a decisive, epochal shift in climate regulation. Having been adopted (though not ratified) by every country on the planet, it is the first truly global pact on the issue.
All Paris signatories are expected to submit their own decarbonisation pathways -- known as Nationally Determined Contributions (NDC) -- and then to revisit and increase their targets every five years.
As a uniquely dynamic, hybrid, and flexible legal framework, the Paris agreement embodies state-of-the-art contract-making. It is light on enforcement, heavy on consensus, and mediated by participation, interaction, and regular monitoring. In addition to being a breakthrough for climate policy, the accord offers a masterclass in institution building, drawing its moral force from a broad-based global movement of activists, NGOs, students, Indigenous groups, and many others.
Although the accord is technically a legally binding treaty (at least procedurally), it relies on the goodwill of individual actors, which makes it a landmark in international law. True, there is no scientific litmus test to determine definitively whether something counts as a "legal system". Rather, the best definition we have is the one given by English legal theorist HLA Hart, who argued, in The Concept of Law, that a legal system is the union of primary and secondary rules -- meaning "rules" and "rules about rules".
Hence, one way to determine if the Paris agreement marks the start of an effective global climate-policy governance system is to see if its "rules about rules" percolate down to the "rules" set by nation-states through domestic legislation. So far, the European Union, Canada, South Korea, Japan, South Africa, and the United Kingdom have all updated existing laws or enacted new ones to uphold their commitments.
International law rests on the notion of opinio juris, which refers to the sense of something being binding. For many around the world, the Paris agreement has indeed instilled this sense of obligation. But not so in the US, where the Republican Party and one Democrat with disproportionate power have been able to threaten the emerging global climate-policy regime.
The US is one of the world leaders in per capita emissions, so its cooperation is necessary to achieve the Paris agreement's goals. If the US cannot back up its climate rhetoric with substantive domestic achievements, its participation in global negotiations is likely to be met with allegations of hypocrisy and "green colonialism". Why should developing countries forego fossil fuels when advanced economies are still consuming them with abandon? ©2022 Project Syndicate
Antara Haldar is Associate Professor of Empirical Legal Studies at the University of Cambridge.
