On Wednesday, Russia will reduce the natural gas flow to Europe via the Nordstream 1 gas pipeline to the equivalent of 20 percent of the total delivery capacity.
According to Russian gas monopoly Gazprom, the reduced supplies are due to technical problems.
Germany, which is dependent on Russian gas, has accused Russia of using the gas as leverage in war diplomacy.
On Tuesday, the EU countries agreed on a voluntary reduction in gas use of 15 percent to reduce dependence on Russian gas.
- It affects everything, and right now there are no alternative sources to get gas from, says Leopold von Brookmann in Munich.
In the video, more reactions are heard from people in European cities.