Why are seals dying?

The seals are mysteriously dying on Baikal. 

https://zpravy.idnes.cz/bajkal-tuleni-rusk.../zahranicni.aspx... 

I was looking at why ... They feel as if they are defeated by the ecosystem of Baikal, or even destroyed by it. They have no choice. They used it for himself and he is not in balance. They feel they were insane. They feel they have failed and are guilty of it, punishing themselves that they were not reliable. They feel rejected and therefore retreat. Excluded. It feels like your duty. They go against each other. He's trying to trust that it's okay. They are friendly to him. 

Baikal destroys man with his interventions, but they do not know it and stretch it on himself. He feels accountable. 

https://zpravy.idnes.cz/bajkal-ekologie-zn.../zahranicni.aspx... 

Every living thing on Earth understands the interconnectedness with everything, only one has not understood :-(