英文關鍵字
line
icon
animation
biological
natural
resource
depletion
consumption
degradation
reduction
loss
source
global
issue
problem
environment
ecological
oil
gas
fossil
fuel
linear
motion
graphic
pictogram
hd
video
thin
logo
outline
loop
art
contour
drawing
animated
illustration
concept
web
symbol
flat
lineart
isolated
design
sign
item
dynamic
simple
dark