dirty smokestacks
- pollutionEnvironmental harm from waste
- smogSunlight-activated urban pollution
- factoriesIndustrial production facilities
- industrialOf factories and production
- sootCarbon from incomplete burning
emissions · chimneys · exhaust · fumes · coal · ash · belching · black · toxic · haze · grime · steel mills · power plants · sulfur · carbon · billowing · refineries · acid rain
environmental cleanliness
dirty smokestacksclean energy
Power from sustainable sources
clean air · emission controls · blue skies · carbon capture · fresh air
energy source type
dirty smokestackssolar panels
Light-converting power generators
wind turbines · wind farms · solar farms · renewable energy · electric grid
industrial era
dirty smokestackswind turbines
Machines converting air movement to electricity
solar arrays · green technology · knowledge economy · Silicon Valley · circular economy