The event was part of the company’s Women Plant Trees project to support the National Tree-Planting Day movement, Holcim said in a press statement.
Holcim stated that the company had planted at least 166,000 trees, including on Nusakambangan Island off Cilacap.
Holcim has been criticized by many groups, including the Natural Resources Conservation Center in Nusakambangan, for not taking enough action to conserve the 53-hectare former mining area.