DENSE black smokes rise highly from dozens of chimneys of close proximity in a village in Sidoarjo, East Java. On a clear day and with a capture from a camera drone, the view of the billowing haze is too unsettling. What is happening beneath is also sickening. The smoke comes from furnaces used by tofu factories.  The fuel is a plastic heap, which is easily shoved into the furnace.

Nevertheless, the tofus cooked with plastic as the fuel is