英文關鍵字
bio
cartoon
city
clean
collection
disposal
ecological
ecology
environmental
europe
garbage
hand
human
litter
man
materials
modern
organic
outdoor
package
paper
person
pollution
protect
protection
public
recycle
recycling
reduce
refuse
responsible
reuse
rubbish
segregation
selection
separate
separation
sorting
trash
urban
utilization
waste