Within a few decades of the invention of the automobile, the horse-drawn carriage disappeared from city streets. Along with all the advantages offered by the automobile, this new means of transportation quickly became a significant source of air pollution. As larger cities became more crowded, the number of cars increased, making travel difficult and adding to the pollution problem as automobile traffic clogged the streets. The development of mass transit systems, including busses, trolleys, subways, and light rail, led to a reduction in traffic and, as a result, a reduction in air pollution.
|Civilization III Buildings|
Airport • Aqueduct • Bank • Barracks • Cathedral • Civil Defense • Coal Plant • Coastal Fortress • Colosseum • Commercial Dock • Courthouse • Factory • Granary • Harbor • Hospital • Hydro Plant • Library • Manufacturing Plant • Marketplace • Mass Transit System • Nuclear Plant • Offshore Platform • Palace • Police Station • Recycling Center • Research Lab • SAM Missile Battery • Solar Plant • SS Cockpit • SS Docking Bay • SS Engine • SS Exterior Casing • SS Fuel Cells • SS Life Support System • SS Planetary Party Lounge • SS Stasis Chamber • SS Storage-Supply • SS Thrusters • Stock Exchange • Temple • University • Walls