英文關鍵字
atmosphere
building
business
careless
city
coal
depressive
dioxide
dirty
ecology
economy
electric
electricity
embankment
energy
environment
environmental
factory
flow
fuel
gas
global
harmful
heat
industrial
industry
infrastructure
kiev
obsolete
pipe
plant
pollution
power
produce
production
river
smog
smoke
steam
sun
technology
ugly
ukraine
vapor
water