> What is reforest?
> Planting trees after you cut them?
> Never heard of it. Such an innovating concept!
> Wait, but some trees take centuries to grow? Surely something actually called 'sustained yield' is not feasible on that time scale.
https://www.britannica.com/science/forestry/Purposes-and-techniques-of-forest-management#ref26194 (In Europe they used also rotation periods of 200 yr)
> It is! If you have a really really advanced technology: you make trees grow faster with magic!
> Woah! We live in forests, but we never thought of using magic like that! We are so dumb! All hail the Japanese other-worlder!
> It's something he invented, but we expected it to be widespread knowledge already!
> It makes so much sense! You are so wise! What about a plague with high mortality?
> You didn't tell me the symptoms, but that's surely the Plague! Rats are infected by
fleas eating infected humans corpses, and humans are infected by
fleas coming in contact with rats. It's because you
are unlucky killed too many cats! If only they had more cats in the middle ages, it wouldn't have halved the population!
> So the rats cause people to die?
> Germ theory! We can't have an isekai without it! Let's spread modern science!
> I see! You give me no proof but I believe you! This is how science works!
> Also, I can create things from my old world with mana! Not drones with nukes, but petrol! Because wasting mana to make 135'000 tons/day like during WWII is the best way to win!