Same applies to production of ammonia, which has numerous uses other than fuel--right at the point of production, if that happens to be under a wind turbine placed at the edge of a farmer's field.
Waste oxygen is a byproduct of ammonia production from water and air. You really want to use pure oxygen to burn your iron, to avoid producing NOx.
Waste oxygen is a byproduct of ammonia production from water and air. You really want to use pure oxygen to burn your iron, to avoid producing NOx.