My point was that if pollution is a concern, researching Mining productivity 2 or higher is a relatively long term answer: yes, better than productivity modules but (due to the resource cost) still a bad idea in the short term. On the other hand, if pollution is not a concern, it isn't a "significant drawback" of modules.mmmPI wrote: ↑Mon Oct 10, 2022 5:25 pmIt would create even more pollution if one had placed PM3 in its mining drill while doing the research !
The (one off) resource cost and (ongoing) increased power of productivity modules are separate concerns and I think pollution is very minor compared to these. For example, as you described, you can't create many Productivity module 3s for the total resource cost of researching Mining productivity 1-3; far fewer than you would need to fill a reasonable number of electric mining drills to get the same +30% productivity.