英文關鍵字
amounts
at
big
center
centre
chemical
chimney
chimneys
clean
concept
concrete
dramatic
electricity
energy
facility
gas
generic
group
huge
industrial
industries
industry
lake
large
lots
manufacturing
many
nuclear
ocean
of
oil
out
pipe
pipes
plant
polluting
pollution
processing
pump
pumping
pumps
refinery
refining
sea
smoke
smoking
steam
steaming
trees
urban
vapor
vent
vents
water