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Hi! For my thesis I want to assess different materials regarding their environmental impacts. Simply put: What are the impacts of the material production from different metals to climate change, human toxicity etc.?

My approach is to find the most low-level flows (copper wire), create a process with input copper and output copper wire and create a product system of this, so i can calculate the impacts. It seems to work so far, but I wanted to double-check that this makes sense.

Your feedback is highly appreciated, thank you!

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If you are only interested in the total impact scores, then I wouldn't hassle with creating product systems using unit processes. I'd go for aggregated processes instead. Depends on what you have in your database.
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In addition, check that the production process (and reference location) fits to what you need, there are several ways to produce copper wire, and you can use copper from different sources evidently.