YOU DON’T SAY: Technology Review: Canceled Oil Pipeline Won’t Mean Less Emissions. “Environmentalists have long opposed the pipeline as a potential danger to water supplies (in the event of a spill). They’ve also said that increased consumption of oil from the oil sands, made possible by the pipeline, would increase carbon dioxide emissions. But unfortunately, it’s unlikely that denying the application for the pipeline will prevent these emissions. The oil will likely be delivered to customers elsewhere in the world, or to the United States by other means, such as oil tankers.”