英文關鍵字
accident
area
canal
catastrophe
contaminated
danger
dangerous
death
decay
disaster
disease
disposal
ecological
ecology
ecosystem
emission
environment
environmental
epidemic
fish
harmful
incident
industrial
infection
lake
manmade
mess
motion
nature
ocean
outdoor
oxygen
poisoned
polluted
pollution
problem
radiation
rotten
salmon
sand
sea
shore
slow
slowmo
slowmotion
smell
stink
toxic
tragedy