River dolphins are threatened critically by widespread habitat degradation and habitat loss caused by pollution, deforestation, dam construction and other destructive river development, and over-fishing.
(River dolphins; are threatened critically; by widespread habitat degradation and habitat loss) (widespread habitat degradation and habitat loss; caused; by pollution, deforestation, dam construction and other destructive river development)
River dolphins widespread habitat degradation and habitat loss
are threatened critically caused
by widespread habitat degradation and habitat loss
by pollution, deforestation, dam construction and other destructive river development