Oh! But the article answered that concern.
While the company is still developing their process and still need to take electricity from the national grid, it believes it will eventually be possible to power the synthesis entirely from renewable sources.
You see, windmills and solar panels don't need to be manufactured [in messy factories hidden away in China.] Unicorns poop them.
It's all basically free.
And lets not forget the several hundred acres you need to power one of these with solar panels.