How can I convince my business partner to adopt a more sustainable supply chain without affecting our profit margins?

I totally get where you're coming from, and I think it's great that you're prioritizing sustainability in your business. To start, I'd suggest gathering some concrete data on the cost savings of adopting a more sustainable supply chain - you mentioned you've done some research, so see if you can dig up some specific numbers on how much you could save by switching to eco-friendly suppliers. This will help address your partner's concerns about the bottom line and make a stronger case for making the switch.

When you present your case to your partner, try to frame it in a way that emphasizes the benefits for the business, not just the environment. For example, you could talk about how adopting sustainable practices can improve your brand image and appeal to customers who are increasingly looking for eco-friendly products. You could also look into certifications like the ISO 14001 standard for environmental management, which can help you measure and improve your supply chain's sustainability.

I've heard of companies like Patagonia and REI that have made the transition to more sustainable practices without sacrificing their profits - in fact, they've often found that it's helped them attract more customers and improve their brand reputation. So, it's definitely possible to make the switch without hurting your bottom line. I'd be happy to help you brainstorm more ideas or provide additional resources if you need them - just let me know what you're looking for.

Ultimately, I think the key is to approach the conversation with your partner as a collaborative effort, rather than trying to convince them that you're right and they're wrong. By working together to find a solution that works for both of you, I'm sure you can find a way to adopt more sustainable practices that benefit both the environment and your business. Good luck with the conversation, and I hope it goes well!