Example.
How many American people really know how to properly wash dishes clean when camping in the field with no hot water, no soap, no sponges? Typical answer: "Why would I want to wash paper plates and plastic utensils?"
EMT shears example explicitly? Ok. Have you ever considered studying the finest skill of blade sharpening? Or do you know how to cut steel wire with your bare hands (simple physics)? Typical answer: "I don't need that. I have my environment. Granted."...
Regarding the environment pollution - every tiny bit adds.
EMT shears have a serrated blade, and can't be sharpened. They also have a rivited joint - non adjustable. And yeah, I've sharpened scissors. EMT shears are stamped, and are made disposable for a good reason. That EMT part of the name? You're going to be cutting stuff (clothes, bandages etc) that ARE covered in biological materials - blood, puss, vomit, feaces, urine etc. You toss them in the "red bag" when you're done - a LOT easier than taking a pair of scissors apart for sterilization, and then having to re-sharpen right after because the steam and chemicals have dulled the edge
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