Tourism also affects the Mediterranean Sea. Studies carried out in 1999 showed that the Mediterranean region received approximately 219.6 million international tourists. By the year 2020, the number is predicted to rise to 350 million. Tourism is no doubt the world’s largest industry, though it impacts the Mediterranean Sea which is rich in biodiversity and easily affected by a small change. Tourism impacts in Mediterranean Sea is tied to unsuitable development to cater for mass tourism. It is based more on quantity rather than on quality which has continuously damaged landscapes, cause soil erosion, and an increase in waste. In the Mediterranean, more than 500 species of plants are under threat of extinction due to intense tourism pressure in overbuilt destinations. The famous sea turtles no longer have nesting grounds in the Mediterranean coastline due to tourism developments.