The Six Kami of Hell

 1. Red dust. Sequoia or redwood trees live up to 1500 years or more also because of tannins, that make a good percentage of the wood mass. Tannins block both molds and bacteria preventing rotting of the wood. But chips and dust of that wood don't rot also and dust can be ground so fine (by the steps or in a ninja crucible) it can pass any filter, except wet filters made with towels on top of low speed fans. It is very irritating, and if spread on large areas of skin, painful. In this image one can see the redust on the blue siding (painted blue recently).

2. Fastly mutating mold and protozoa. Because redwood is so antimicrobial, like anything antimicrobial, it mutates the very few surviving microbes. Garbage, dog poo and bottles with all sort of "witchcraft" thrown on the chips or the grass nearby start to create smelly, ferocious kami... inside.

3. Granite dust. Last year in January snow covered the alleys. By the time snow was almost gone and traffic almost came back to normal, they spread granite gravel on the alleys. The gravel was never removed and cars ground it to a fine dust within the next month. Every Wednesday the blowers came and raised that dust to the sky, in their attempt to "clean" the alleys. Some fell on the buildings and some on the grass.

4. Mole emanations. Mole are venomous. Some modified digestive enzymes present in their saliva paralyse and zombify earthworms, their exclusive food. Those enzymes are present as aerosols in their galleries. Worms once fallen in a gallery go all by themselves and fill poaches with hundreds of fresh, live worms. Sometimes moles bite their head, and the worms enter a slow "regeneration" process that can last months keeping them alive and immobilized, ready to be eaten.

5. Ninja smoke. Once a mole (re)opens a gallery near our building, they come, under the pretext of walking a dog, and stick small burning pellets made by ancient recipes that contain saltpeter and a number of ingredients that mask the smell and get you either high or absent. Moles leave (temporarily) until the smoke is gone or i go and plug the holes and then they come back and the process restarts.

6. Dog droppings. Dog droppings from sick dogs may contain T-gondii, a parasite that once in  your got produces dopamine, hooking  you up. It may go into your blood and cyst in your brain. A high percentage of population is infected, but they don't claim symptoms, probably because of the dopamine, probably the reason so many people "love their pets". The available recommended medication doesn't really work, there are many other unintended medications that suppress the parasite. However, you must eliminate the source first.