character: DDT
topic: Historical use and effects on fish populations
subject: Science
LearnActions
SearchCreate
character: Pesticides
topic: Impact on aquatic ecosystems
subject: Science
LearnActions
SearchCreate
character: Biomagnification
topic: Consequences of chemical pollutants in food chains
subject: Science
LearnActions
SearchCreate
character: Endangered species
topic: Protection of fish populations affected by pollution
subject: Science
LearnActions
SearchCreate