Opposition to pipelines means more oil must be transported by railcar, where spills become muuuch more likely.
Do you have a source for this? I mean there are a lot of pipeline leaks and ruptures that go unreported and certainly don't make the national news the way a train fireball does. How many train derailments with associates spills or fireballs are there?
While spills slip under the radar all the time I think if there were three train fireballs in a week we would hear about it. Actually one of those spills in the article is the Canadian derailment I heard about.