abstract
ash
background
biomass
borer
brown
closeup
conservation
construction
cross
cut
deforestation
ecology
emerald
emerald ash borer
energy
environment
firewood
forest
fraxinus
industry
log
logging
lumber
material
minnesota
nature
nigra
northern
outdoors
paper
pile
pulp
raw
rural
section
stack
texture
timber
tree
wood
woodpile