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Pollution Control Inside City

It reduces pollution emissions from buildings inside the city to zero.
However, construction costs will double
and maintenance costs will increase by 1.5 times for the measure.

Pollution control within the city has become mandatory,
and all factories have devised a variety of ways to emit no pollution.
Although this will increase the cost of operation & construction,
the citizens will be able to live in peace because there will be no pollution.

The pollution caused by buildings outside the city will remain the same.

pollution -> 0
construction cost -> x 2
maintenance cost -> x 1.5

For ToolsShop and Brewery.
( Intra-city facilities that are discharging pollution
at the time of implementation of the update. )