Though almost enclosed, the Black Sea is deep. With low oxygen levels, the
water is an extremely vulnerable environment. For the past thirty years, the
major rivers that flow into the Black Sea have been dumping massive quantities
of industrial waste into it, resulting in considerable damage to the
Economically speaking, the Black Sea is still the most popular tourist destination for people in nearby countries. But more significant is the large volume of traffic passing through the area – both people and goods, including gas and oil on its way from the Caspian Sea. These are mostly transported on tankers, but major construction work is currently underway on pipelines.