Hello 
I wanted to do a small project about the power consumption and environmental manufacturing costs (carbon footprint etc.) of an Arduino and its accessories, which are necessary for the project, and could find little on the internet about the carbon footprint etc. of the individual parts.
Therefore I wanted to ask if someone here knows how I can orient myself.
Thanks in advance
it's hard for an individual without info from the manufacturer. it depends where and how they source / produce their parts and the whole supply chain around it... there are probably general studies you could find
Your characterizing of your project as "small" is quite hilarious.
Have you done any study on electronic manufacturing? Each Arduino board has different components and the source of a component for a particular board will change over time and will be different for each manufacturer that happens to build your selected board.
In general, small boards will be built in panels of circuit boards, with up to 50 Arduino boards being built at a time. All surface mount components will come from reels of tape with each individual component in a little bubble in the tape. Up to 5,000 components may be on a single reel. Integrated circuit components may also be on tape and reel or may come in flat trays of 40-50 per tray.
The panel of Arduino boards will have solder paste applied either by a CNC machine or by use of a metal stencil and the solder paste spread through the stencil by a squeegee.
You can find more and more about electronic manufacturing for yourself.
In short there can never be anything "small" about your project and there will never be an end value that can be determined. Good luck!
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