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ORE MINES
Description
1. Produces 10 ore plus 0.4 for each tech level in ore-mining, over a 24 hour period.
2. Each mine requires 5000 population to staff it, or it runs at reduced capacity (low efficiency).
3. Amount of ore produced is influenced by the ore percentage of the planet. An 80% ore planet produces ore at 80% of the optimal rate.
4. The ore percentage on a planet declines over time at a rate proportional to the number of ore-mines on the planet, causing ore-mines to lose efficiency.
Strategies
1. Build mines on planets with high ore percentage.
2. To reduce ore-depletion, do not build more than 400-450 mines on a planet, unless the planet is so rich that you can withstand a certain amount of ore-depletion, or the game is likely to end before the depletion becomes a major factor.
3. If you have very low market discount, then buying ore is very expensive, and it is better to mine even low-ore planets than having to buy ore.
4. At 32% market discount, mining is more profitable than factories for any planet with more than 58% ore.
5. At 40% market discount, production points can be traded for ore cheaply, and it is not worth mining planets with less than 65% ore.
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