Oil can destroy rivers by suffocating living plants and aquatic animals and killing micro-organisms that form an important part of the food chain and ecosystem.
(Oil; can destroy; rivers; by suffocating living plants and aquatic animals and killing micro-organisms) (micro-organisms; form; an important part of the food chain and ecosystem)
Oil micro-organisms
can destroy form
rivers by suffocating living plants and aquatic animals and killing micro-organisms
an important part of the food chain and ecosystem