Photos: The World's Most Polluted River

It was once a gently flowing river, where fishermen cast their nets, sea birds came to feed and natural beauty left visitors spellbound. Today, the river is in crisis, choked by the domestic waste of nine million people and thick with the cast-off from hundreds of factories. Is this how the whole world will look in near future. We've got to stop and do something about this now. Tomorrow is too late...