Uhmm... Does anyone have a spare gig of server space? Let's face it, the job of a military force is to be hazardous to someone's health. If it wasn't, it wouldn't be taken seriously. Don't sweat the triox, I know people who've used it for years.

The fumes of trioxe are toxic. So are those of heximine, which is what the Esbits use. The MRE heater emits a level of hydrogen that is impressive- put one and a cup of water into a 3 liter soda bottle, shoot it ten minutes later. Sterno and candles put out carbon monoxide. The fumes of any kind of fuel are toxic, some more so than others, big deal. They need air, you need air, get more than enough for both of you.

Just remember that fuel and food are rarely interchangable, unless we are talking corn chips. Keep the fuel and it's residue out of the food, and don't let the fumes build up under, say, the lid of your pot where they would contaminate your food. Don't cook over the bare flame, either.