The merged pull request with the current reversion that you did, will error if you distribute the new version as in the code it references the correct spelling pollution sources. I am just making sure that you realize this before distributing. The places in the code:

• EcomodASMHooks line 128
• PollutionHandler lines 566, 653
• TileAdvancedFilter lines 100, 160
• EMConfig lines 288, 294, 296, and 297

This is assuming you are not first implementing the other config versioning system and are going to use the correct PollutionSources config for the latest merged pull request. If you do use the latest config you can just close this issue.

EDIT: The pull for reference is #27