Beyond commerce, innumerable other productive activities, such as, mechanical, carpentry, and welding workshops, tool and die, to mention but a few, do also occur in the informal sector.

STANFORD Last January, China s environmental authorities barely averted the contamination of nearly three million people s drinking water after a mining company dumped cadmium a toxic heavy metal used in the manufacture of batteries, paint, solder, and solar cells into the Longjiang River.