The Climate Accountability Institute has updated its Carbon Majors Project which details the direct and product-related emissions traced to the major industrial carbon producers in the oil, natural gas, coal, and cement industries through 2013.
Klinker or clinker bricks were overcooked rejects, a product of intense and smokey coal-fired kilns. They were considered a waste product until early Craftsman builders found their sculptural architectural merits.
Beautiful buildings but the thought of birds flying into the glass is dreadful, so all large panes of mirror should have a deterrent, like a hawk cut-out or strips of ribbon hanging in front. Nesting season would be a particularly problematic time.