Siberia has experienced many enviromental problems because of

Policies during the Soviet era

The changes that Russia underwent during the Soviet Era were extremely profound. In Siberia, these have severely affected the environment. These policies were often designed as a way to industrialize the country, with little regard for the environment. It is likely that current climate change will continue to damage the environment of this region.

maybe by travelers or gossip

would not cooperate with each other voluntarily.