Three steps the new government should take for a cleaner ocean
It is positive that the new government has made the protection of the marine environment and nature a priority. The ambition to expand the protected marine areas, establish more marine national parks and strengthen efforts against pollution of the marine environment are important steps in the right direction.
It is also necessary to a certain extent. Danish fjords are struggling with oxygen depletion. Biodiversity is under pressure. Our aquatic environment does not at all meet the EU's requirements for good condition and many Danes rightly see the state of the ocean as one of the most visible environmental challenges of our time.
But if the ambition is cleaner and healthier seas, an important piece of the puzzle is missing: shipping.
Shipping puts a strain on the marine environment
When we talk about the marine environment, the debate is often about nutrient emissions from agriculture, fishing or wastewater. When we talk about shipping, the discussion is typically about climate and CO2emissions. But shipping also directly impacts marine ecosystems through air pollution, underwater noise, and the release of harmful substances and microplastics. Therefore, shipping should be considered as part of marine environmental policy, and not just as part of climate policy.
This is important because shipping is far from being a marginal environmental burden. International shipping accounts for around three percent of global greenhouse gas emissions, which is more than the annual emissions of many industrialized countries. Ships also emit nitrogen oxides (NOx), sulfur oxides (SOx), particulate matter and black carbon, all of which contribute to air pollution and can affect the coastal and marine environment. At the same time, underwater noise from ships is increasingly recognized as a significant burden on marine life, affecting the behavior, communication and migration patterns of marine mammals and fish.
studies has also identified ship paint as a significant source of microplastic pollution in the ocean.
Three steps towards a cleaner marine environment
Firstly, Denmark should develop a comprehensive strategy to reduce the impact of shipping on marine ecosystems.
Although regulation exists in some areas, a comprehensive approach to the sector's overall environmental footprint is currently lacking. Such a strategy should include greenhouse gas emissions, air pollution, harmful chemicals, underwater noise, microplastics from ship paint, wastewater and greywater discharges, invasive species, and impacts associated with port activities.
It should start with better monitoring and mapping of shipping's environmental footprint in Danish waters. We cannot effectively manage what we do not measure. A dedicated strategy for shipping's impact on marine ecosystems will create a strong knowledge base for future policy and help identify where efforts can create the greatest environmental gains.
Secondly, shipping should be integrated into the government's electrification agenda. The government is right to place electrification at the centre of the green transition. But ports and shipping remain largely absent from this discussion.
For many parts of shipping, electrification is no longer a technology of the future. Electric ferries are already in operation with great success throughout Scandinavia, and research shows that battery-electric solutions can significantly reduce both emissions and operating costs on suitable routes. Shore power also allows ships to switch off their auxiliary engines while at berth, eliminating local emissions of NOx, SOx, particulates and CO.2 during port stays.
In addition, electrification reduces noise both above and below the water surface, improving conditions for both coastal communities and marine life. At the same time, electrification supports the broader transition away from fossil fuels and strengthens the basis for investments in renewable energy and electricity infrastructure.
Denmark should therefore explicitly include ports and shipping in the national electrification plans. This involves a faster rollout of shore-side power in the largest ports, support for the electrification of domestic ferry routes, investments in charging infrastructure and ensuring that the expansion of the electricity grid takes into account future maritime electricity consumption.
Third, Denmark should use its international voice actively. As one of the world's leading maritime nations, Denmark has a responsibility to help shape the future of global shipping. Decisions about the sector's climate footprint are made not only in Copenhagen, but also in the UN's International Maritime Organization (IMO).
Denmark should take the lead
Later this year, member states will make crucial decisions on the Net Zero Framework for shipping in the IMO. The outcome will influence investment decisions in the global maritime sector for decades to come. Denmark should be a clear and prominent advocate for an ambitious framework that creates clear incentives for zero-emission fuels and technologies.
Denmark has already taken an important first step by raising the marine environment higher on the political agenda. The next step is to ensure that all significant pressures on our marine environment become part of the solution – including shipping.
A cleaner and healthier ocean requires that we think of ocean protection, climate action and shipping as part of the same agenda.
By developing a comprehensive strategy for the environmental impacts of shipping, accelerating the electrification of the maritime sector and working for ambitious international action, Denmark can contribute to cleaner seas while strengthening its position as a global frontrunner in sustainable shipping.
This opinion piece was published in Naturmonitor on July 27, 2026 and was written by Katerina Davidova.









