In a February 2015, the US EPA responded to the U.S. Department of State's Final Supplemental Environmental Impact Statement (Final SEIS) for the Keystone XL Pipeline Project, that the pipeline will significantly increase greenhouse gas emissions because it will lead to the expansion of Alberta's carbon intensive oilsands. and that over the proposed 50-year timeline of the pipeline, this could mean releasing as much as "1.37 billion more tons of greenhouse gases into the atmosphere". EPA concluded that due to the current relatively cheap cost of oil, companies might be less likely to set up their own developments in the oil sands. It would be too expensive for the companies to ship by rail. However, "the presence of the pipeline, which offers an inexpensive way to move the oil to market, could increase the likelihood that companies would extract from the oil sands even when prices are low". The EPA suggested that the State Department should "revisit" its prior conclusions in light of the drop in oil prices.