Individual species in trouble were said to be early warning signals, like canaries in coalmines, or small but essential, like rivets in airplanes — the works and windings of natural systems, which no sane tinkerer would cast aside. (academic.oup.com)
Bush «evidently signalled his willingness to meet with industry leaders as early as February when the hosts of the coal forum — all owners and executives of coalmining companies — emailed out the first save - the - date notices,» The Guardian reported. (sourcewatch.org)
The former of these works was commissioned by the Kunsthalle Recklinghausen — a gallery set in one of Germany's coalmining regions — and appears as a huge mound of black coal, interspersed with red diodes, which is encircled by another part of the commission — Time Train to the Holocaust (2008). (aestheticamagazine.com)