TheoTown

How can I place my industry buildings as close as I can to residential without worrying about having the pollution spread?
Seems that placing trees in the pollution area causes them to die.

I have a feeling that tree mods are the answer, but I also want to know a way to deal with this problem without using plugins.

Place commercial between the industrial and residential. Interlaced with parks.

I use farms

Some parks reduce pollution and noise such as beer garden (at the cost of space where you can place much more important buildings) and placing beaches in the parks tab will also reduce noise and pollution but you need to build water so that you can build beaches (which is a waste of money since you need to build water first then beaches).