英文關鍵字
awareness
biodegradable
bottle
cleanup
close
closeup
conservation
consumerism
contamination
crisis
disposal
earth
ecological
ecologist
ecology
environment
environmental
forest
garbage
hazard
impact
landfill
less
litter
man
mask
nature
planet
plastic
poisonous
pollute
pollution
problems
protection
protective
recycle
recycling
reduce
resources
responsibility
reuse
scientist
social
suit
toxic
trash
up
waste
world