英文關鍵字
agriculture
anaerobic
and
bio
black
burn
burning
closeup
combustion
compound
crop
danger
ecological
energy
equipment
fire
flame
fuel
furnace
gas
green
heat
heating
high
hot
industrial
industry
light
mass
orange
organic
oven
pellet
people
plant
power
recycling
red
renewable
residue
smoke
stove
technology
temperature
yellow