,Main reason,Mediterranean medtreninis the most polluted.,Developed countries,Italy,France,Spain,Underdeveloped countries,Egypt,Greece,Populations,Egypt: 81,940,984Greece : 9,903,268,Populations,Italy 60,813,326 France 63,800,000 Spain 47,190,493,Industry,Italy : processing industry, etc. France: manufacturing business, chemical industry, mining industry, etc. Spain: manufacturing business, etc.,Industry,Egypt Greece These two countries are not so good at the industrial production.,Agriculture,Developed countries ：Small part of revenue and residents income comes from agriculture.But, this of France is very developed.,Agriculture,Egypt Greece Because of the lack of technology, these two countries are still developing the agriculture.,Tourism,Italy (Roma) : ancient city France: the most romantic country Spain: the most fascinating country,Tourism,Egypt: pyramid prmd, sphinx sfks，etc.Greece : Aegean sea , ancient city, etc.,History,Egypt Greece : They both have long history. They are part of the cradle of human civilization.,External trade,Because of the convenient transport , the external trades are very flourishing.,Result from all these factors, we can see the main reason of the water pollution in Mediterranean,