燃やす
alternative
background
bio
color
compressed
copy
eco
ecological
ecology
energy
environment
environmental
fire
flammable
flat
fuel
green
growing
heap
heat
heating
lay
leaves
light
many
natural
nature
nobody
object
pellet
pellets
pile
plant
power
recycling
renewable
resources
saving
seedling
space
sprouting
text
top
view
warm
white
winter
wood
wooden