Coal Mining
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Coal Mining is a research technology in the Economy tree of the Research Center in Whiteout Survival.
Overview
Coal Mining increases Coal Gathering Speed. It is available in 5 tiers (Coal Mining I, Coal Mining II, Coal Mining III, Coal Mining IV, Coal Mining V), each with multiple upgrade levels.
Research costs include 5 resources: Resource, Meat, Wood, Coal, and Iron. Prerequisites require a specific Research Center level and, for higher tiers, completion of previous tiers. Construction times are base times and do not account for Research Speed bonuses.