When the 2015 Paris Agreement was inked nearly a decade ago, it marked a consensus, agreed to by nearly all the countries in the world, that global temperature rise should be limited to well below 2 degrees Celsius over preindustrial levels. But the treaty hinges on those almost 200 countries periodically submitting goals outlining just how much they\u2019ll individually cut emissions in the coming years, and then following through. Although the Paris Agreement didn\u2019t stipulate a formal accountability mechanism, these plans \u2014 called Nationally Determined Contributions, or NDCs, and submitted every five years \u2014 were envisioned as catalysts that would signal national priorities, guide policy, and match the ambition required by the rapidly approaching 2-degree target.\u00a0<\/p>\n
Ten years on, however, that ambition is lagging. The vast majority of countries missed a February deadline to submit updated NDCs, and many now appear likely to miss a September deadline, too<\/a>. Roughly 50 countries have formally submitted their third NDCs \u2014 the first two were due in 2015 and 2020 \u2014 and 50 or so made announcements about their new emissions targets at the climate summit during the United Nations General Assembly last week. (Many of the latter have not yet formally submitted their NDCs.)<\/p>\n But even those commitments that have come in on time don\u2019t appear likely to substantially move the needle on global temperature rise. According to one preliminary analysis<\/a> by the World Resources Institute, a nonprofit that tracks NDC pledges, the new plans so far would only reduce emissions by 2 gigatons \u2014 just 10 percent of what experts say is needed to stay on track for the 2-degree threshold.\u00a0\u00a0<\/p>\n \u201cCompared to what would be required for a path that keeps to the goals of the Paris Agreement, they\u2019re largely insufficient,\u201d agreed Joeri Rogelj, a professor of climate science and environmental policy at Imperial College London who studies NDCs.\u00a0<\/p>\n At last week\u2019s U.N. summit, Chinese president Xi Jinping announced that the country would reduce emissions 7 to 10 percent by 2035, plus expand its deployment of renewable energy by a factor of six. The country, which is currently the world\u2019s largest greenhouse gas emitter, has seen its emissions plateau in the last few years. Experts view the target as one that China will easily be able to reach, given that its transition to renewable energy is already proceeding at an unprecedented pace; some have argued that slashing 30 percent of its emissions is both necessary and feasible<\/a>. (Although President Xi Jinping announced a new target at the summit, China has not yet formally submitted an NDC.)<\/p>\n Two of the world\u2019s largest historical emitters, the United States and the European Union, arrived at this year\u2019s summit with their climate commitments in question. Last year, then-president Joe Biden\u2019s administration submitted an updated NDC<\/a> touting emissions reductions that would be achieved by climate legislation recently passed by a Democratic majority in Congress, which was poised to cut emissions by up to 66 percent of peak levels by 2035. But in the months since, President Donald Trump has reversed course by repealing most of that legislation, making moves to withdraw the U.S. from the Paris Agreement, and telling world leaders that climate change is a \u201ccon job.\u201d At the summit last week, he warned countries that \u201cif you don\u2019t get away from this green scam, your country is going to fail.\u201d\u00a0<\/p>\n Meanwhile, the European Union, which has long been setting ambitious climate targets, has been mired in its own internal politics. Countries within the union have been split on how ambitious their 2035 target should be, as well as the role of carbon offsets. The EU has submitted a statement of intent promising to have an updated NDC by COP30, the annual climate conference taking place in Belem, Brazil, later this year, and agreed to include reductions between at least 66 and 72 percent by 2035. At the summit, EU Commission President Ursula von der Leyen announced that the group \u201cis working on a 2040 target of a proposed 90 percent emission reduction.\u201d<\/p>\n Rogelj, the climate science and policy professor, chalked up the EU\u2019s delayed formal commitment to the challenges of making deeper emissions cuts and a rightward shift in local politics.<\/p>\n \u201cAs the easier sectors are starting to become decarbonized, it becomes an increasing challenge to deliver,\u201d he said. \u201cThe current political mood music in the EU, with clear resurgence from the right, which is not always in favor of environmental action, results in harder and more difficult negotiations.\u201d\u00a0<\/p>\n