Ontario (more so the municipalities) is still cleaning up Oil Springs almost a hundred years after Standard Oil moved on to easier pickin's in AlbertaThose billionaires would be you and me. Damn near everything in this country is partly owned by Crown Investment Corp, CPP or EI and private pensions and besides, what is there to "clean up"?
http://www.omafra.gov.on.ca/english/engineer/facts/10-041.htm