Geography of Russia , the Russian border is the world's longest. Along the 20,139-kilometer land frontier, Russia has boundaries with 14 countries: Norway, Finland, Estonia, Latvia, Lithuania, Poland (via the Kaliningrad Oblast), Belarus, Ukraine, Georgia, Azerbaijan, Kazakhstan, Mongolia, the People's Republic of China and North Korea. Approximately two-thirds of the frontier is bounded by seawater. Virtually all of the lengthy northern coast is well above the Arctic Circle; except for the port of Murmansk—which receives currents that are somewhat warmer than would be expected at that latitude, due to the effects of the Gulf Stream—that coast is locked in ice much of the
Arctic policy of Russia north of the Arctic Circle. Overall, about 10% of the world's petroleum resources are estimated to be in the Arctic. The dominant portion of offshore Arctic hydrocarbon (oil and gas), as reflected in the USGS studies, is located within the current uncontested Exclusive Economic Zones of the five nations bordering the Arctic. In September 2013, Gazprom's oil drilling activities in the Arctic have drawn protests from environmental groups particularly Greenpeace. Greenpeace has opposed oil drilling in the Arctic on the grounds that oil drilling would cause damage to the Arctic ecosystem and that there are no safety plans in place