英文關鍵字
animated
animation
background
black
box
business
care
change
community
concept
concepts
conceptual
conservation
corporate
earth
ecology
energy
environment
environmental
friendly
global
green
health
international
isolated
issues
metaphor
natural
nature
panels
planet
protect
recycling
renewable
resources
responsibility
safe
section
social
solar
sustainable
symbol
teamwork
tree
water
world