Environmental Rating of the 15 biggest Swiss watch companies IWC comes out on top..... https://www.wwf.ch/sites/default/files/doc-2018-12/2018_12_07_WWF Watch and Jewellery Report 2018_final_e_0.pdf
All the “active participants “ in the study received a better ranking which translates into dollars donated to the extortion group
Sadly I don't think much can be deducted from this study due to the way data was collected. But it's a question that Watch Collectors rarely ask. That's why I stay with vintage and pretty much never buy new pieces.