I used to know a fellow who spent some years working for "the oil industry" in the far east. That would be a couple of decades ago. He really enjoyed the stre

I used to know a fellow who spent some years working for "the oil industry" in the far east. That would be a couple of decades ago. He really enjoyed the street food. But, as he told me, you had to be careful. How did a vendor have fresh fare without power nor evident means of fresh supply and cooling? Well, per him, some vendors kept supplies submerged in formaldehyde. I've never looked up independent confirmation of this, and I haven't been there and so had to worry about it. But he was, in my experience, a straight shooter and not one inclined towards tall tales.