Spectators line the seawall in Pondicherry, erected to hold back the advancing Bay of Bengal, to watch dozens of Ganesh statues being immersed into the sea for the the Ganesh Chaturthi Festival.  Originally, Ganesh statues were made from clay and would dissolve into the sea without a trace.  Now hundreds of thousands of non-biodegradable painted papier-m&acirc;ch&eacute; statue Ganesh statues are thrown into the sea up and down India's coasts significantly increasing the levels of iron, copper, mercury, chromium and acid in sea water.