Published on: 2026-08-10
Source: United Nations – United Nations –
An important disclaimer is at the bottom of this article.
August 10, 2026 Climate and Environment
For Odysseus, the Mediterranean Sea was not just a place that the road home passed through – it was a world of trials and revelations, where love coexisted with danger, and destiny spoke through the voices of monsters, sirens, and capricious gods. Each island became a new chapter of his travels, each shore a new twist of fate.
Two and a half millennia after Homer first told this story, Christopher Nolan, following a host of other renowned directors, decided to depict Odysseus’s journey on screen. But outside the realm of cinema, another hero is undergoing his own odyssey – the sea, whose stormy waters once carried the legendary hero’s ship.
The Mediterranean Sea is an ancient artery connecting Africa, Asia, and Europe. It is a route along which cultural exchange, goods, and ideas have passed for centuries. The sea fed people, allowed them to earn a living, and became part of their myths and prayers.
Today, the shores of the Mediterranean Sea are home to more than half a billion people. Here, ports bustle with activity, cities grow, fishing markets develop, and tourist ships follow the busiest sea routes on the planet.
The Mediterranean Sea remains a natural treasure trove: making up only one percent of the world’s ocean waters, it contains up to 18 percent of known marine species, a quarter of which are found nowhere else.
The underwater meadows of Posidonia – a marine grass named after the god Poseidon – spread over millions of hectares, sheltering life, retaining carbon, nourishing seawater. Marshes, dunes, wetlands along the coasts protect the shoreline from storms, provide people with food, water, and a sense of home. But these landscapes are increasingly suffering from pollution.
New monsters of the Mediterranean Sea
Today, the Mediterranean Sea faces enemies that cannot be found in any ancient myth. Every day, hundreds of tons of garbage carried by rivers enter its waters. Millions of harmful particles drift on its surface, most of which are plastic that naturally takes centuries to decompose.
Wastewater, chemicals, garbage from ships, microplastics, pharmaceutical waste – all of this slowly poisons the marine environment.
The region is warming faster than the rest of the world. Heatwaves, droughts, wildfires, floods, erosion – all of this is becoming part of the new reality. The rich marine life – turtles, dolphins, swordfish, octopuses, the rarest monk seal – is retreating under the pressure of construction, pollution, and industrial activities.
When large species disappear, fishermen are forced to catch small fish, disrupting the ancient order of the food chain. Alien species brought by ships and aquaculture displace those that have lived here for centuries.
These troubles are interconnected: weakened ecosystems protect shorelines worse; warm water helps invasive species spread; tourism develops faster than activities aimed at protecting the sea.
Odysseus fought monsters one by one, but modern enemies of the sea, destroying its health, act together.
The sea has its own hero
In 1975, the Mediterranean gained a protector – the Mediterranean Action Plan (UNEP/MAP), implemented by the United Nations Environment Programme (UNEP). A year later, countries adopted the Barcelona Convention – the first legal shield created to preserve the sea and its shores. Seven protocols of the convention cover all aspects: from protection against hazardous wastes to biodiversity conservation, from offshore operations to coastal development.
Twenty-one countries and the European Union are working together to ensure that the sea does not lose its voice. The action plan helps them monitor water conditions, reduce plastic and chemical pollution, improve wastewater treatment, and prepare for possible oil spills.
The Regional Plan to combat marine litter adopted in 2013 was the first legally binding document of its kind. It supports the establishment of marine protected areas, restoration of damaged ecosystems, protection of seagrass meadows and rare species, control of invasive organisms. Today, more than eight percent of the sea is under special protection.
As temperatures rise, UNEP/MAP helps countries restore natural barriers so that coastlines can withstand storms. Work on sustainable production, tourism, and marine planning helps the economy grow without destroying what makes the sea alive.
“We strive for a sea that is alive and thriving, a sea whose natural inhabitants, entire ecosystems, and industries can support millions of people from many cultures for whom this region is home,” said program coordinator Tatiana Hema.
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