Polish Prime Minister Mateusz Morawiecki, Danish Prime Minister Mette Frederiksen and Polish President Andrzej Duda symbolically hold the tap of Baltic Pipe. AP
Polish Prime Minister Mateusz Morawiecki, Danish Prime Minister Mette Frederiksen and Polish President Andrzej Duda symbolically hold the tap of Baltic Pipe. AP

Poland and Norway open 'milestone' trans-Baltic gas pipeline