Harry Potter and the Old Ones

Because of the addition of magic, the reclamation of wasteland is not that difficult——

Left is just a matter of fire.

Molly Weasley used the drying spell to make the wildly growing weeds and trees on the wasteland lose their bright green color, turn yellow and shrivel, and eventually turn into lumps of dead grass and dead wood.

Things will be much simpler after that. After a "raging flame" spell, you can get a fertile field.

"So Tiera, what do you think this is for?" While Molly Weasley, Mrs. Weasley, was leading wizards and parents to reclaim the wasteland, Arthur Weasley and Tiera were standing In front of a huge metal can, he watched the can slowly sink into the pit that Tiera and the others had just dug with magic under the combined force of several wizards' levitation spells.

"This is called a biogas digester." Tiela said, "It is a method of using organic waste, um, feces and urine, and yes, food waste, etc., to produce biogas through fermentation."

"Fermentation? Production of biogas? What is this?" Arthur Weasley asked like a curious baby.

"Brewing is a type of fermentation." Tiera tried to explain to Arthur Weasley in the most simple and simple language.

"You mean we can turn feces, urine and food scraps into wine!?" Arthur Weasley asked with surprise and disgust. "Muggles are really geniuses. They can do this without magic." ?"

"No! No!" Tiera felt like playing the piano to a cow. "What I mean is that fermentation is a natural phenomenon discovered by Muggles. This natural phenomenon was later mastered and exploited by Muggles. After the fruits are fermented, they become various kinds of fruit wine. Similarly, they ferment feces, urine and food residues, which turn into a gas and some residues."

"The gas is biogas. It can be burned and used for power generation or cooking. The rest only needs to be treated a little before it can be used to make fertilizer." Tiera said as if she was giving them a high school biology elective. three.

"Genius! What a genius! How did those Muggles think of it?" Arthur Weasley admired.

"Is it possible?" Tiera sighed and said, "Because Muggles don't have magic and can't use the disappearing spell, and then the feces accumulate there, smelly and rotten, which forces them to find a way to get rid of the feces and Convert it into something useful to you?”

"Ah, didn't they use a flush toilet to solve the problem?" Arthur Weasley asked in confusion.

"Then have you ever thought about how the feces is disposed of after the toilet removes the feces?" Tiera asked.

"Isn't it buried in the soil?" Arthur Weasley asked, "Yes, why don't we just bury the feces and urine directly in the soil? Wouldn't this be able to fertilize our crops? How many times have we done before? The second time was that Jasmine asked us not to use the disappearing spell to deal with the feces, and we had to bury the feces into the soil to fertilize the crops."

"In this case, the utilization rate is too low. The decay of feces will produce various harmful gases. These harmful gases can be used as fuel." Tiera explained patiently, "Secondly, this will lead to too many nutrients in the soil. This leads to stress, um, bad effects on crops."

"So that's it." Arthur Weasley said suddenly.