Dozens of trucks and cars have lined up in front of a coal mine in the Polish city of Bogdanka recently to reserve heating fuel.

80% of Poland's electricity comes from coal, but coal production has gradually declined as the cost of deeper mining has increased.

  Since August 11, the EU's coal embargo on Russia has officially taken effect, which has caused Poland, which is heavily dependent on coal, to face energy shortages, and domestic coal production is difficult to meet the people's winter coal demand.

Therefore, Poland has increased its domestic coal mining efforts while seeking import substitution.

At the same time, the price of European natural gas futures exceeded $3,500 per thousand cubic meters for the first time since March, hitting a new high in nearly half a year.