It is environmentally better not to use Carbon -That is what was done more than 100 years ago but, living in the real world getting the needed 3Hs for each molecule of NH3 is much cheaper if They come from methane, CH4 instead of electrolysis of water. (I assume that is what his wind machine is doing.)
Even if you have N2 and H2 pure it is not easy to make them into NH3. High pressures and temperatures are required (and catalysts to make the formation conditions not be so extreme and costly)
Why don't you educate yourself a little about the production of NH3 - it has progressed a lot in the hundred + years since it was made from air and water. I have given you a good link for this in my last post. Here is another on the production, designed to be simple enough for a high school student:
http://www.ausetute.com.au/haberpro.html
Where you can read the basic requirements:
In 1909 Fritz Haber established the conditions under which nitrogen, N2(g), and hydrogen, H2(g), would combine using
medium temperature (~500 C)
very high pressure (~250 atmospheres, ~25,500kPa)
a catalyst (a porous iron catalyst prepared by reducing magnetite, Fe3O4).
Osmium is a much better catalyst for the reaction but is very expensive.
This process produces an ammonia, NH3(g), yield of approximately 10-20%.
Also explained there are the FUNDAMENTAL LAWS for this chemical reaction, which GreenNH3.com can not change:
"... At 200 C and pressures above 750atm there is an almost 100% conversion of reactants to the ammonia product.
{When the equilibrium concentrations shown in the graph are finally reached - the reaction is slow at these lower temperatures.}
Since there are difficulties associated with containing larger amounts of materials at this high pressure, lower pressures of around 200 atm are used industrially.
By using a pressure of around 200atm and a temperature of about 500 C, the yield of ammonia is 10-20%, while costs and safety concerns in the building and during operation of the plant are minimised ..."
If you prefer to just remain ignorant, just say so and save me from any more effort trying to help you.
