architecture
background
blue sky
bulb
caring for the earth
city
concept
creative
daytime
defend
design
ecological
ecological environment
ecological equilibrium
ecological protection
ecology
electric energy
energy
environment
females
figure
global
globe
glow
grassy
green
hand
idea
illustration
illustrator
lighting
love
multistoried building
open
power supply
press
promote
protect
protect the environment
protection
resource
save
saving
sustainable
switch
thought
treasure
waste
white clouds
world map
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