..resulted from offshore drilling? The great majority were caused by ship accidents. In fact, as we have seen in the North Sea, it is arguably safer to bring the crude oil ashore in undersea pipelines, than it is to ship it via tanker in littoral waters. BTW, take all projections about "untapped reserves" in the US which a LARGE grain of salt - we have been stopped from even drilling exploratory wells in ANWR and offshore, so all estimates are based on seismograph readings, which can be wildly off as far as quantity.