Harry Potter and the Great Old Ones.

Chapter 734 Popular Science
“And the reason Mrs. Weasley had you bury the excrement directly in the ground,” Tierra said, “is probably because you used magic to ripen several batches of crops before.” Tierra continued.

“Yes, yes, Tyella, you’re so clever,” Arthur Weasley said. “Jasmine did indeed use magic to ripen a giant pumpkin, which I took to the pumpkin contest in Bedfordshire.”

“Hehe.” Tiera chuckled. “I remember those pumpkin contests in Muggles. The winners usually get a prize, right?”

"Huh?" Arthur Weasley suddenly blushed, as if his embarrassing secret had been exposed. "Yes, there are some, but not many."

"It's nothing, please rest assured. From now on, I will only support such things, not oppose them," Tierra said.

“Thank you, Tyella! You’re a wonderful and enlightened leader,” Arthur Weasley said, showering her with praise.

“There’s no such thing as enlightened or unenlightened,” Tierra said. “This is also one of my methods for promoting integration between wizarding and Muggle societies.”

“To be honest, I just thought of that myself. You or another official from the Magical Union could pretend to be a Scottish farmer and participate in one of those pumpkin size contests. Our Potions and Rare Herbs Management Department will provide you with some potions that can make pumpkins grow bigger.” Tiera smiled slyly. “Then, at the party after the contest, when those British farmers ask you about your pumpkin experience, you can take out those potions and give them some to try for free. When they keep asking you for more, you can give them the contact information of our Muggle Liaison and Product Distribution Department colleagues. This will be another Muggle sales route we open up besides the elixir of immortality.”

"Moreover, the company we have now established is a biopharmaceutical company, which perfectly meets the requirements for applying for pesticide and fertilizer licenses," Tierra added.

“Genius! Tyella, you’re a genius!” Arthur Weasley exclaimed. “This idea is brilliant! We really should look for opportunities to better integrate magic and the Muggle world, I mean,”

“Yes, we need more of these innovative ideas. If we can use our resources properly, we can solve many problems that are very difficult for Muggles,” Tierra said. “Remember, whether Muggle or wizard, we all share one common attribute: humanity!”

Tierra delivered an impromptu inspirational speech—

He helplessly discovered that he was becoming more and more skilled at this kind of thing.

Dirty politicians!
Tierra gave herself a slight pang of self-reproach, then led Arthur Weasley, the other wizards, and the Muggles who had come to design the biogas digester and lay the pipes to the next pit to place the biogas digester, and continued to repeat the work they had just done.

After several hours of hard work, all fifty biogas digesters were finally installed and buried deep in the ground, leaving only a narrow opening for future inspection and maintenance.

After the last biogas digester was checked for airtightness, the moon was already high in the night sky.

“Magic is so convenient,” Tierra said with a smile to Arthur Weasley, who insisted on staying by her side. “This workload would take at least a week to complete in the Muggle world.”

(End of this chapter)