Thousands join human chain across the German-Polish border to protest brown coal mining

Demonstrators protest with a human chain against planned coal mines at the Neisse river , German-Polish border near Gross Gastrose, Germany Saturday Aug. 23, 2014. Several thousand people have formed a human chain across the German-Polish border in a protest against open-cast mining for brown coal, also known as lignite, in the region. (AP Photo/dpa, Patrick Pleul) (The Associated Press)

Demonstrators protest with a human chain against planned coal mines at the Neisse river , German-Polish border near Gross Gastrose, Germany Saturday Aug. 23, 2014. Several thousand people have formed a human chain across the German-Polish border in a protest against open-cast mining for brown coal, also known as lignite, in the region. (AP Photo/dpa, Patrick Pleul) (The Associated Press)

Demonstrators protest with a human chain against planned coal mines at the Neisse river , German-Polish border near Gross Gastrose, Germany Saturday Aug. 23, 2014. Words read : Stop Coal. Several thousand people have formed a human chain across the German-Polish border in a protest against open-cast mining for brown coal, also known as lignite, in the region. (AP Photo/dpa, Patrick Pleul) (The Associated Press)

Several thousand people have formed a human chain across the German-Polish border to protest the expansion of open-cast mining for brown coal in the region.

Organizers said more than 7,500 people linked up in an 8-kilometer ( 5-mile) chain between Kerkwitz, Germany, and Grabice, Poland — two villages that activists fear will be evacuated to make way for further brown coal mines, also known as lignite.

Some of Saturday's demonstrators waded into the Neisse river, which divides the two countries, as part of the chain. The leaders of Germany's opposition Green party were among those attending the protest.

Both coal and lignite, which is decried as a dirty fuel by environmentalists, play a significant part in the energy mix of both Germany and Poland.