public static void ClearAlienBiomesOuterTheSources()
{
for (int i = PurpleIvyData.TotalPollutedBiomes.Count - 1; i >= 0; i--)
{
int tile = PurpleIvyData.TotalPollutedBiomes[i];
if (PurpleIvyUtils.TileInRadiusOfInfectedSites(tile) != true)
{
Log.Message("Return old biome: " + tile.ToString());
BiomeDef origBiome = Find.WorldGrid[tile].biome;
BiomeDef newBiome = BiomeDef.Named(origBiome.defName.ReplaceFirst("PI_", string.Empty));
Find.WorldGrid[tile].biome = newBiome;
PurpleIvyData.TotalPollutedBiomes.Remove(tile);
PurpleIvyData.BiomesToRenderNow.Add(tile);
}
}
}