Pipeline transport oil-contaminated sediment and debris from the Kalamazoo River system. However, oil was still being found in affected waters in October 2012. Fossil fuels can be transported by pipeline, rail, truck, or ship, though natural gas requires compression or liquification to make vehicle transport economical. For transport of crude oil via these four modes, various reports rank pipelines as proportionately causing less human death and property damage than rail and truck, spilling less oil than truck, and having more environmental impact than truck or rail (mostly due to impact on habitat; ship transport impacts marine habitat to a large degree). Pipelines
Central Asia–Center gas pipeline system proposed to renovate existing systems and construct a new parallel pipeline to the western branch. On 12 May 2007, Vladimir Putin of Russia, Nursultan Nazarbayev of Kazakhstan and Gurbanguly Berdimuhamedow of Turkmenistan signed a memorandum for renovation and expansion of the western branch of the pipeline. On 20 December 2007, Russia, Turkmenistan and Kazakhstan finalized agreement on construction of the Caspian Coastal Pipeline parallel to the existing CAC-3 pipeline (known as Bekdash–Europe pipeline or Okarem–Beineu pipeline). Almost all Uzbek and Turkmen natural gas is delivered through the CAC pipeline system, mainly through the eastern branch due to location of production