US Geological Survey (USGS) estimates 30% of world's undiscovered gas and 13% of oil resources are in Arctic which amounts to 90-100 millionbarrels of oil worth millions of dollars
Much dispute centers around whether an area of ocean bed known as Lomonsov Ridge is an extension of Russia's continental shelf (and therefore part of its EEZ) or not
3 parties in dispute have nuclear weapons (Russia, USA, and EU)
In 2007: the Russians used a submarine to place a Russian flag on the seabed at the North Pole which inflamed tensions
Since then the number of 'scientific' expeditions to the Arctic has increased, as countries seek to have a greater presence in the area
Both Russia and Canada have created dedicated 'Arctic Forces' to protect their interests.
By 2019, Norway, Canada, USA and UK had all strengthened their Artic military capacity and patrols
Tensions likely to further rise as global warming leads to melting ice and increased accessibility to shipping for longer periods of the year and oil and mineral exploration becomes easier.
As oil reserved elsewhere run out, Arctic oil will look increasingly tempting.
In theory, the UN will decide whose claims stand and whose do not.