英文關鍵字
abandoned
barrel
benzine
cask
change
chemical
chemistry
cistern
colorful
container
contamination
danger
deteriorate
dirt
dirty
drum
dust
energy
engine
environment
frazzle
fuel
gallon
garbage
gas
gasoline
hazard
heap
industrial
industry
iron
metal
oil
old
petrol
petroleum
pile
pollution
pouring
resource
rusty
shortage
steel
stone
tank
toxic
vat
waste
wilderness