Factory smokestacks at sunrise

1200 × 750

Industrial skyline with smoke

1680 × 1050

Factory smoke pollution

1280 × 1024

Factory smoke at dusk

1600 × 1000

Industrial pollution from aerial view

1542 × 1000

Industrial smoke at sunset

2560 × 1600

Factory smoke at sunset

1600 × 1200

Factory smoke at sunset

1680 × 1050

Factory smoke at sunset

1600 × 1200

Factory smoke at sunset

1280 × 1024

Factory smokestacks emitting pollution

1300 × 1012

Factory smoke at sunset

1920 × 1200