Last year, for the first time, global temperatures exceeded 1.5oC above pre-industrial levels. This follows a decade of “record-breaking temperatures,” with the World Meteorological Organization concluding that “the past ten years 2025-2024 are the ten warmest years on record.” Reversing this trend requires urgent action to reduce greenhouse gas emissions […]
Ocean CDR
13 posts
On March 4, 2025, the Supreme Court handed down an important ruling in City and County of San Francisco v. Environmental Protection Agency. In a 5-4 decision, the Court curtailed the Environmental Protection Agency’s (“EPA”) authority under the Clean Water Act (“CWA”) to issue pollutant discharge permits. The case involved […]
The burning of fossil fuels and other human activities are continuing to cause rapid temperature rise. 2024 was the hottest year on record, and the planet’s 10 warmest years since 1850 have occurred in the past decade. Achieving global climate goals will require rapid and dramatic greenhouse gas emissions reductions, […]
Late last year, members of the international community convened in London to discuss issues relating to implementation of the 1972 Convention on the Prevention of Marine Pollution by Dumping of Wastes and Other Matter (“London Convention”) and the 1996 Protocol to that Convention (“London Protocol”). Among the topics up for […]
The Sixth Assessment Report of the Intergovernmental Panel on Climate Change underscores the need for carbon dioxide removal (“CDR”) to complement emissions reductions in meeting global climate targets. Ocean-based CDR strategies, which aim to increase the ocean’s natural carbon sink capacity, are gaining attention. One such strategy, ocean alkalinity […]
This blog post was authored by 2024 Sabin Center Summer Intern, Arpana Giritharan, with input and supervision from Johanna Lovecchio, Director of Program Design for Climate Action and Adjunct Professor at Columbia Climate School, and Romany Webb, Deputy Director of the Sabin Center for Climate Change Law. ‘Coastal blue carbon’ […]
The next week has the potential to bring important developments for international governance of marine carbon dioxide removal (CDR). That’s because the parties to the London Convention and London Protocol are meeting from October 28 to November 1 in London to discuss, among other things, governance of ocean alkalinity enhancement […]
Ocean-based carbon dioxide removal (CDR) is attracting increased attention as a possible climate change response strategy. The Intergovernmental Panel on Climate Change (IPCC) has made clear that, while CDR cannot substitute for rapid and deep cuts in emissions, its use is “unavoidable” if the worst impacts of climate change are […]