Great information. There have got to be a few natural tar pits around the world that Enviro Loons could label HAZMAT sites. Is there information on how many oil seeps are around the world, and how many barrels of oil are naturally seeped into the oceans? This article states: The amount of natural crude-oil seepage is currently estimated to be 600,000 metric tons per year http://137.227.239.65/reports/reprints/Kvenvolden_GML_23.pdf