Blast, Furnace00:30 Smoke, Smog, Stack00:09 Coal, Mixer00:30 Fuel, Coal, Load00:12 Smoke, Smog00:26 Smoke, Smog00:29 Smoke, Smog00:22 Cooling00:26 Pollution00:13 Air, Carbon00:08 Blast, Furnace00:30 Fire, Wood00:30 Fireplace, Candle00:19 Barbecue, Food, Bbq00:19 Fire, Flames00:13 Factory00:15 Factory00:15 Pittsburgh00:10 Allegheny River00:11 Coal, Fuels, Black00:06 Coal, Mining, Truck00:10 Coal, Mining, Truck00:06 Old, Man, Senior00:07 Cooling00:30 Cooling00:22 Abstract, Ash00:29 Abstract, Ash00:29 Abstract, Ash00:29 Construction00:07 Factory00:12 Factory00:13 Cooling00:10 City, Thermal00:23 Fire, Flame00:29 Air, Business00:15 Flames, Smoke00:20 Pipe, Factory00:13 Commercial, Trading00:19 Commercial, Dock00:27 Blacksmith, Strike00:10 Blacksmith, Strike00:10 Blacksmith, Strike00:08 Blast, Bright00:13 Blast, Furnace00:30 Blast, Furnace00:30 Blast, Furnace00:30 Railway, Container00:15 Blacksmith, Metal00:15 Blacksmith, Metal00:20 Blacksmith, Metal00:20
