business and industry category most true manufacturing with the exception of boats is done in another state or the business is selfâinsured. Boats can be made of wood, metal,
Citarum River, Indonesia. The Citarum is the third longest river in Java, but it has been called the world's most polluted river â and for good reason. While the debris on top of the water is the most visible sign of a problem, what lies under the surface is the bigger problem.
STORY HIGHLIGHTS. 1  Delhi is most polluted city in the world in PM2.5 concentrations. 2  Half of the top 20 most polluted cities were in India, according to data. 3  PM2.5 is considered most harmful to health.