A Russia-Ukraine stand-off over gas price results in a stoppage of Russian gas supply to Europe.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/gas-war
[2] http://admin.indiaenvironmentportal.org.in/category/author/vladimir-radyuhin
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/frontline-chennai
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/natural-gas
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/europe
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/russia
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ukraine