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