Pollution

Pollution is a secondary unit of heat production from power sources. Pollution is most abundantly produced by Coal Mine s and Coal Burner s but is also produced by alternate power sources at a lower amount.

Pollution can be mitigated by utilising Small Park Filterings and upgrading them to consume more pollution than you produce.

Pollution Money Bonus
The money bonus from having low pollution ranges from 0% to 50%. That is if you are making 100 cash per second, with the full money bonus you would instead get 150 cash per second. You start off with no pollution and hence have a full 50% money bonus. When your pollution creeps over 100M you will notice the money bonus has dropped to 49%. For every 200M after that you will lose another 1% until there is no bonus at all by 5 billion pollution.