I don't think it's possible. (Unless my understanding of the term "carbon negative" is mistaken.)
Let's suppose you could manufacture your devices with 0 carbon emissions. No solar, no wind, no gas, no nothing. Some other energy source with no carbon inputs needed. For the sticklers, let's suppose none of the human employees breath or anything during the manufacture of the products. So no carbon there either.
You still have to deliver it right?
Let's suppose you make it in Chicago, or Miami, or San Fran, wherever. How are you going to get that product to Lincoln Nebraska with no carbon emissions? How will you get it to Lyon France? Or Aguadilla PR? or Ningbo? Or Mwanza? (And in this case it would have to be more than "no" carbon emissions, it would have to be "negative" carbon emissions.)
I'm not certain any company can deliver a physical product with negative carbon emissions. It seems almost impossible without using funny math.
I believe negative carbon emissions are typically done via projects like carbon capture (various methods) and regulatory credits (essentially paying other people to reduce their emissions).
