Phurnacite Report - Health in Wales

Before the advent of natural gas, smokeless fuel manufactured from coal was the main source of energy for domestic heating and heavy industry. ... “During the cold winter period tar becomes a hard solid mass that is quite brittle and would splinter when hit with an object such as a hammer. ... Soc Psychiatry Psychiat Epidemiol 1998; 33: 124-8 ... ................
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