Pepsi's "efforts" to "promote" environmentalism....totally fails

I do, actually.

But my main purpose was meant to show how Pepsi got their chemistry wrong, as they're implying that they were emitting into the environment poisons instead of pollutants. While they may sound the same, how its worded makes all the difference.

Internal combustion engines produce carbon monoxide. Pepsi's trucks likely use internal combustion engines. They also likely improved their efficiency, either with the engine itself or the fuel it uses. I don't see the problem.