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All Things Rocket Stoves Puzzle

Horizontales
The amount of heat required to raise 1kg of water 1 deg C.
Burning.
The opposite reaction to combustion.
The sound rushing gas makes and the reason we call them rocket stoves.
A negative result of inefficient cooking systems to the environment.
The most abundant element in our atmosphere.
Verticales
There are two products of combustion. One is water vapor, the other is this.
The most common system for cooking in developing nations that is inefficient.
Where all energy comes from.
A necessary input to all combustion equations.
A dangerous biproduct of incomplete combustion to the respiratory system.
Besides Hydrogen, this element is in all things we burn and likes to be connected in chains.
The thing we care most about maximizing in energy systems.