This technology seems almost too good to be true. It's simple, it's deployable, it's self-sufficient. What kind of emissions does this produce? It says they're

This technology seems almost too good to be true. It's simple, it's deployable, it's self-sufficient. What kind of emissions does this produce? It says they're within U.S. standards, but is that a high standard? How can it burn at such high temperatures without some additional fuel source? While this technology is incredible (and important for developing countries), how much of what they're disclosing about it is true and what damage might it do in the long term?