Add ponder scene to chemical' attribute (like their effect to player or environment)
Even though some of them are easy to understand without the guiding, it's always better to give a detailed description.

this seems really neat. Especially for adverse health effects or localized pollutants.

Pollution now has lots of ponders in 0.1.0. Descriptions of the mob effects given by ingesting certain chemicals I think is sufficient for describing adverse health effects.