Environmental groups have lodged a complaint with the European Commission over a Polish government plan for extensive logging in Europe's last primeval forest, saying they were forced to take that step after running out of options in Poland.

Seven groups, including WWF and Greenpeace, lodged their complaint Tuesday, arguing that the plan violates a key European conservation law.

Last month, Poland's Environment Minister Jan Szyszko approved extensive logging in the Bialowieza Forest, in northeastern Poland, saying it was to help fight the spread of bark beetle. Environmentalists believe that is merely a pretext for massive commercial logging.

The forest is on UNESCO's World Heritage list and is home to hundreds of wild bison, over 60 other species of mammals and hundreds of species of trees, plants and lichens.