Section 20 of the Clean Air Act 1993 (“the 1993 Act”) provides that where a chimney is either—
Mae adran 20 o Ddeddf Aer Glân 1993 (“Deddf 1993”) yn darparu, pan fo simnai naill ai—
Section 20 of the Clean Air Act 1993 (“the 1993 Act”) provides that where a chimney is either—
Mae adran 20 o Ddeddf Aer Glân 1993 (“Deddf 1993”) yn darparu, pan fo simnai naill ai—