environmental
alternative
bark
beech
bonfire
brown
bundle
camping
country
countryside
dry
ecological
ecology
environment
fire
firewood
forest
fuel
green
heap
heat
ignition
lumber
many
material
natural
nature
old
outdoor
pattern
pile
raw
renewable
resource
rustic
scene
season
split
stack
stacked
sticks
summer
timber
tranquil
tree
trunk
twigs
wood
wooden
woodland