3r
at hand
blackboard
carbon
chalk
character
children
clean
clean energy
decarbonization society
draw
earth
eco
ecology
education
energy
energysaving
environment
environment protection
environmental issues
global environment
global warming
green innovation
hand
image
innovation
japan
japanese people
natural
no face
protect
recycling
renewable
renewable energy
reuse
save
sdgs
sustainability
sustainable
sustainable development objectives
text
word
write