Cypriot oil tanker "Haven" burning in the Gulf of Genoa.
Enlarge Image
The Mediterranean sea is one of the most heavily polluted, semi-enclosed basins in the world. Thousands of tonnes of toxic waste are pumped directly into the sea by industry. Other threatening factors include shipping, urban and agricultural pollution and the effects of tourism.
Heavy metals and persistant organic pollutants (POPs) cause
irreversible risks to health and marine life. High concentrations of
mercury, cadmium, zinc and lead in sediments are found at “hot-spots”,
generally located in the coastal zones receiving high levels of
industrial effluents, solid waste and domestic sewage. These substances
can travel thousands of kilometres, across national boundaries, far
from their source.
This creates a serious health risk in a
region where fish is an integral part of the regional diet and many
people depend on the sea for a living.
Shipping
Some
of the world’s busiest shipping routes are contained in the
Mediterranean. It is estimated that approximately 220,000 vessels
of more than 100 tonnes cross the Mediterranean each year – about one
third of the world’s total merchant shipping. Many ships are carrying
hazardous cargo, which if lost would result in severe damage to the
marine environment.
The discharge of chemical tank washings
and oily wastes represent a significant source of marine pollution. The
Mediterranean Sea constitutes 0.7 percent of the global water surface
and receives seventeen percent of global marine oil pollution. It is
estimated that every year between 100,000 and 150,000 tonnes of crude
oil are deliberately released into the sea from shipping activities.
Approximately
370 million tonnes of oil are transported annually in the Mediterranean
(more than 20% of the world total), with around 250 to 300 oil tankers
crossing the Sea every day. Accidental oil spills happen frequently
with an average of 10 spills/year. A major oil spill could occur at any
time in any part of the Mediterranean.
Tourism
The
most popular tourist destination in the world, the Mediterranean Seas
unique combination of pleasant climate, beautiful coastline, rich
history and diverse culture attracts approximately one third of the
world’s international tourists.
Tourism is one of the most
important sources of income for many Mediterranean countries. It also
supports small communities in coastal areas and islands by providing
income alternatives far from urban centres. Despite providing economic
benefits to the region, it has had a major role in the degradation of
the coastal and marine environment.
Rapid development and
the building of infrastructure have been encouraged by governments in
Mediterranean countries to support the large numbers of tourists
visiting the region each year. This overcrowded urban development has
caused serious erosion and pollution problems in many places along the
Mediterranean coasts.
Tourism often concentrates in areas of
high natural wealth, causing a serious threat to the habitats of
endangered Mediterranean species such as sea turtles and monk seals.