Terracotta: Sustainable Production in Vietnam #3

 The firing temperature for Terracotta is between 800 and 900 degrees, much lower than for other materials and the kilns are built with bricks produced in the same kilns

Terracotta: Sustainable Production in Vietnam #2

The Kilns are fired entirely with rice husks, the outermost layer of the rice grain which is usually removed from the rice. An other renewable source.