英文關鍵字
abandoned
beautiful
blue
danger
dirty
ecological
ecology
environment
environmental
forest
garbage
geology
grass
green
industrial
pollution
industry
junk
lake
landscape
natural
nature
old
outdoor
outdoors
park
perspective
plant
plastic
polluted
water
problem
recycling
reflection
reservoir
river
rocks
sand
scenic
sea
shore
tourism
toxic
transportation
trash
travel
vacation
waste