Russia sanctions: How can the world cope without its oil and gas?
A key Russian gas pipeline to Europe has been closed indefinitely because of leaks, meaning gas supplies to the continent will remain tight heading into winter.
Nord Stream 1, an underwater pipeline running across the Baltic Sea to Germany, had been supplying EU states with 35% of all the gas they imported from Russia.
EU leaders suspect the leaks were created deliberately, but have stopped short of blaming Russia for them.
How did the leaks occur?
Operators noticed leaks in Nord Stream 1 in a stretch of pipe near the Island of Bornholm in the Baltic Sea. There were also leaks in a parallel pipeline called Nord Stream 2, which is not yet in use.
Seismologists in Denmark said there had been explosions under the sea in the same are...