Stacked clay bricks being fired in clamp kiln, smoke and heat escaping

stacked clay bricks fired clamp kiln smoke heat brickyard air pollution construction industry smolder clamp kiln firing brick manufacturing stack greenhouse gas emissions brickworks smoking south africa emitting harmful gases global warming smoldering bricks construction material smouldering greenhouse gases heap building material openair claybricks emit brickwork industry production smoulder industrial clay building block business build materials manufacturer masonry pollution