What is the economic value of marine ecosystems? And how does plastic pollution reduce these economic values?
A landmark study a few years ago showed, first of all, that the value the oceans provide to humanity is roughly $50 trillion a year. The global economy is about $130 trillion a year, so it is of a similar order of magnitude.
A lot of that value is not priced into the actual economy. Services such as coastal protection, fisheries, clean air, and climate regulation are not fully accounted for, yet they represent a tremendous amount of value.
Another study indicated that the reduction of ecosystem services due to ocean plastic is in the order of half a trillion to two and a half trillion per year.
To put it into context, stopping almost all plastic from going into the ocean would cost about $100 million a year, which is roughly 0.001% of the cost. It is therefore far cheaper to stop plastic pollution than to allow the status quo to continue.
Could you share some concrete examples related to livelihoods, tourism, and fisheries?
There is a direct economic impact of plastic pollution. Fishermen face several challenges. First, it takes significant time to remove plastic from their nets.
Second, in terms of tourism, people tend to avoid places with heavy plastic pollution. We have seen this, for example, in the Gulf of Honduras in the Caribbean, where after deployment, tourists began returning as the coasts became cleaner.
There is also an impact on real estate. Properties and buildings are more valuable when they are located along clean, attractive coastlines where people want to swim, compared to polluted shores.
How do you decide where to deploy technology—whether in a river, along a coastline, or in an ocean garbage patch? What trade-offs shape these decisions?
To address the issue, you need to both clean up what is already in the ocean and stop plastic from entering it.
If you stop new plastic from flowing in, coastal waters largely clean themselves because most of the debris is not persistent and eventually washes back onto the shoreline. This means beaches only need to be cleaned once, as long as no new plastic arrives.
To clean the majority of the ocean, the key is to stop plastic from entering in the first place, which is why we focus on deploying solutions in rivers.
What is an interceptor?
An interceptor is a tool developed by The Ocean Cleanup to catch plastic in rivers before it flows into the ocean.
There are different types of interceptors, but most are variations of a system that includes a barrier to capture plastic and a method to remove it from the water and bring it to land.
The removal process can involve conveyor belts, excavators, or manual methods. Since every river is different, we have developed a portfolio of solutions with different barrier designs, extraction methods, and anchoring systems to suit specific conditions.
Once the technology is deployed, what role do local communities or institutions play, and how do you ensure the solution remains participatory rather than purely technological?
Interceptors create local employment opportunities. There is substantial work involved in operating the systems and handling the collected waste.
We partner with local operators who manage day-to-day operations and employ people from nearby communities, often including those from marginalized groups.
This ensures that the solution not only creates value for ecosystems and industries downstream but also generates direct local economic benefits.
How do interceptor systems perform under monsoon conditions, and what design modifications are necessary for Indian river systems?
In cities like Mumbai, tidal conditions are a key factor. Systems are designed to capture plastic moving in both directions due to tidal flows.
This creates multiple opportunities to capture plastic, even if some is initially missed, improving overall effectiveness.
From a policymaking perspective, how cost-effective are river interception solutions compared to strengthening municipal solid waste systems?
Global waste management currently costs around $500 billion a year. To bring systems worldwide to a high standard, such as OECD levels, would require investments in the trillions per year.
In contrast, stopping plastic pollution from the approximately 1,000 most polluting rivers would cost in the order of $100 million per year, which is a difference of several orders of magnitude.
This is because less than 0.1% of all the waste we produce flows into the ocean. By targeting rivers, we focus only on that fraction which would otherwise end up in the ocean.
While this is not a replacement for improving waste management systems, it acts as a necessary and immediate solution to reduce ocean plastic while broader systems are improved.
How do you see India’s role, not just as a site of intervention, but as a contributor to global knowledge, policy, innovation, or scalable models?
Our work in Mumbai has been significant as a model for other cities. It was the first time we implemented a smart river survey approach at scale.
We deployed dozens of AI-powered cameras across the city and conducted extensive, year-long research. This approach has been so successful that it is now being replicated in other cities.
It combines local expertise with global experience to create effective solutions.
Additionally, we are moving towards manufacturing equipment locally in India, leveraging the country’s strong industrial capabilities, which also makes scaling more practical.
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