environmental
blue
building
chemical
chimney
climate
clouds
condensation
construction
contamination
cooling
danger
ecology
electric
electricity
energy
environment
factory
fuel
gas
generate
global
greenhouse
heat
industrial
industry
infrastructure
landscape
manufacturing
nuclear
oil
plant
pollute
pollution
power
production
radiation
sky
smog
smoke
stack
station
steam
structure
tower
toxic
turbine
vapor
warming
waste