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Planting trees to reduce pollution
:''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.
You can reduce [[#Ground Pollution|ground pollution]] and [[#Radiation|radiation]] by planting [[tree|trees]].
==Ground Pollution==
