Part,  Chapter, Paragraph

1    I,     2.  8    | occupational)~Natural gas~ ~Cleaner burning than other fossil fuels,
2   II,     5.  9.  4|    pollution, dust, the inefficient burning of fuels for cooking and
3  III,    10.  5.  1|          example of the ban on coal burning in Dublin shows: after the
4  III,    10.  5.  1|          ban on coal sales and coal burning, black smoke concentrations