France has set a goal to cut its greenhouse gas emissions by 50% by 2030, as outlined in its third National Low-Carbon Strategy. Recent analysis shows that the areas where industries are working to reduce their carbon footprint often overlap with regions undergoing what is called "green" reindustrialization. These areas, once major industrial hubs, are now attracting new investments, from the port city of Dunkerque to Fos-sur-Mer in the south. Since 2021, France has seen a surge in funding for new industrial sectors like hydrogen production and electric battery manufacturing, along with efforts to make steel and petrochemical industries cleaner. These initiatives are supported by national strategies, including the National Strategy for Decarbonized Hydrogen and the National Strategy on Batteries. A database created by the "Reindustrialization, Transitions and Logistics in the Seine Valley" project shows that most of the announced industrial investments in France are concentrated in ports and former industrial centers. These areas have long seen a decline in traditional manufacturing but now are becoming focal points for new green industries. Similar trends are also visible in the United Kingdom. Industrial-port zones are particularly important, with four major port areas—Haropa, Dunkerque, Marseille-Fos, and Nantes-Saint-Nazaire—accounting for nearly half of all announced investments in 2023, totaling 12 billion euros. These zones benefit from existing infrastructure like port facilities and pipeline networks, which help support large-scale investments. In Dunkerque, construction of gigafactories—large-scale production facilities for batteries—is moving forward alongside changes in steel production at ArcelorMittal. In Fos-sur-Mer, projects are focused on hydrogen, synthetic fuels, and solar panels. In the Seine Valley, the emphasis is on hydrogen, recycling, and synthetic fuels. However, not all projects are proceeding as planned. For example, the solar panel gigafactory by Carbon in Fos-sur-Mer and a molecular plastic recycling plant by Eastman in Port-Jérôme-sur-Seine have been put on hold or abandoned. Investments in reducing carbon emissions tend to cluster in areas with high levels of existing emissions. Research shows a strong correlation between the amount of CO₂ emissions and the level of investment in a given area, with a correlation coefficient of 0.77 since 2020. This suggests that areas with existing industrial infrastructure and a ready customer base are more likely to attract investment. For example, hydrogen production plants often benefit from nearby industries looking to reduce their own emissions, while carbon capture projects are more likely to be built near major sources of emissions. Public policies at European, national, and local levels are playing a key role in shaping these developments. The European Green Deal and the Fit for 55 package aim to reduce emissions across the continent, indirectly focusing on industrial regions in France. At the national level, the France 2030 initiative provides subsidies for industrial decarbonization, hydrogen, recycling, and battery projects. Local infrastructure companies, such as RTE and Natran, are also prioritizing the expansion of electrical networks and new molecule transport systems in former industrial areas. Despite these efforts, challenges remain in ensuring that the reindustrialization of these regions is sustainable. Delays in European regulations and the cancellation of some projects, like the Carbon project in Fos-sur-Mer and the Eastman plant in Port-Jérôme-sur-Seine, highlight the risks involved. While current investment trends are significant, they do not guarantee long-term stability or success for these areas, which continue to undergo rapid and complex changes.