Lagesi is African population big country the capital of Nigeria, population 1800 much, and still increasing quickly. This city sees tree very hard, the city zone is rattletrap building, the suburb is bare moorland. Sea accept is a of America country Dominica small town, population has 90 thousand only. Say it is the whole world pollutes the most serious city to had been not been. Reclaim because of batteries here famous, most American abandons old batteries to arrive at here. Russia nimble Er holds the post of Si Ke, population 260 thousand. Russia is here center of essential chemical industry, russia period ever was ground of chemical weapon production. Long-term chemical experiment makes here stores a large number of toxicant are qualitative, life of average per capita has 42 years old only. Xin Deli, be called to be the capital with the dirtiest whole world, millions person is in slums. Qieernuobeili, as the small town that produces nuclear disaster, qieernuobeili's pollution need not say more. Hundred thousands of person suffers from because of that nuclear accident on incurable disease. Kabuwei, african country Zambia the 2nd big city, it is area of plumbic zinc rich ore. Local uses the water of pollution getting lead, life of average per capita has 38 years old only.