英文關鍵字
animated
animation
business
care
change
clouds
community
concept
concepts
conceptual
conservation
development
earth
eco
ecology
environment
environmental
friendly
global
globe
grass
green
health
hemisphere
international
isolated
issues
lower
many
nature
oak
old
people
planet
protect
protecting
recycling
reddish
responsibility
social
stranded
sunlight
sunset
sustainable
symbol
team
together
togetherness
tree
world