I hadn't heard about "biogas" before reading your post, so I Googled it. From what I gathered, it's a system that turns waste into energy. But I'm not quite sure how it would work in a household setting. Would you use it for producing electricity, heating, or something else?

As for Pakistan, I doubt you'll find much information from my compatriots. It seems like biogas might be used at a commercial level, but I'm almost 99.9% sure it's not common at the household level here.

And about that price difference... I mean, how many centuries had passed before you reopened the site? 😵‍💫

Edit: my husband says that "biogas" plants are common amongst farmers/agricultural sector. They use it because they have a lot of dung.