Pollution

Pollution is emitted by a large number of buildings, such as the Quarry, Iron Mine and Kitchen. It rests on the ground, and gives a negative modifier to the happiness of any Peep which walks through it. Pollution can be removed from tiles by placing Cleaners.

Slight Pollution
The first stage of pollution. Gives a -1 modifier to the happiness of any Peep which walks through it.

Pollution
The second stage of pollution. Gives a -2 modifier to the happiness of any Peep which walks through it.

Heavy Pollution
The third and final stage of pollution. Gives a -3 modifier to the happiness of any Peep which walks through it.