Pollution

Various machines in GregTech generate pollution that can cause harmful effects to players and even the terrain. Fortunately however, pollution will slowly spread and dissipate over time.

Measurement
Pollution in GregTech is measured in gibbl. To find out how much pollution a particular chunk has, you can craft the Portable Scanner device, charge it, then right-click on anything within a specific chunk, and it will print out in chat how much, if any, pollution there is in that chunk.