The UN climate process needs ambition – the law demands it

Bill Hare is the CEO of Climate Analytics, a global climate science and policy institute working to accelerate climate action. The word ‘implementation’ has featured long and loud recently in discussions about the UN climate process. The host government of last year’s COP30 summit, Brazil, argued that it should be an “implementation COP”. And if you talk regularly to influential participants in the UN process, you’d be surprised how many will tell you that in the current political climate, it’s all about implementing the pledges and targets governments have already made, rather than aiming to raise them. This interpretation of ‘implementation’ is dangerously wrong. You can see that it is wrong by simply going back to the Paris Agreement. Article 4 states that Parties (countries) “shall prepare, communicate and maintain successive nationally determined contributions” (NDCs), and that each new NDC “will represent a progression” beyond the Party’s previous one and “reflect its highest possible ambition”. In other words, regularly increasing ambition is a central element of implementing the Paris Agreement. Governments pledged to increase ambition regularly, and the community of people who care about climate change needs to hold them to that pledge. Raised expectations Even a cursory look at the current state of emissions shows that without increased ambition, the other central pillars of the Paris Agreement will not be realised. The global emissions peak will not come “as soon as possible”, net zero will not be reached in the second half of this century, and global warming will race beyond the 1.5°C limit, with catastrophic impacts beginning in the most vulnerable countries and risks increasing for everyone. Since the Paris summit in 2015, expectations and obligations on governments to step up on decarbonising their economies have increased. In 2021 and 2022, governments declared via the UN Human Rights Council and UN General Assembly that the right to a he