The areas in poland where jews were forced to live were called

Answerstratovolcanoes///near or in the ring of fire;

Dis the answer you perception is how you see the world 

When a lake, river or other aquatic  system  becomes  eutrophic, it can have serious negative effects on other organisms like fish, birds and even people.if an algal bloom is so bad that it causes wide-spread death  in  the  water, the organisms that die will all sink to the bottom and start to decompose.