Pollution is the nasty stuff caused by industry, the mining and drilling operations, coal and oil power plants, and Sewage Outflow Pipes. It comes in two kinds; Ground Pollution and Air Pollution... You can reduce ground pollution and radiation by planting trees.
- Main article: Air Pollution
Air Pollution is generated by some buildings, is effected by the wind, and can negatively impact Health when it blows across areas where your population works or lives. Over time Air pollution levels in a region can increase and produce a haze that hangs in the air.
- Main article: Ground Pollution
Ground Pollution is the result of unclean industry, sewage, and garbage practices within your city. Ground pollution accumulates over time, and can cause sickness in buildings over top of it, as well as polluting your water table..
- Main article: Water Pollution
- Main article: Radiation