Most of us using the gde tune replace the def with distilled water.. LolSorry guy but let’s not paint everything with an old broad brush. Have you forgotten that diesel emissions are not what they were years ago. Are you not aware of the pee squirters that are standard today?
Green Diesel Enginering has been tuning the Eco Diesel motor for more than 5 years at this point and they don’t make the engine produce more pollutants. Actually they reduce the soot that the engine produces. Combine that with the urine bath that the exhaust particles get and your alamism regarding air pollution is out of place.