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Japan is gripped by mass allergies. A 1950s project is to blame

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Re: Japan is gripped by mass allergies. A 1950s project is to blame

#51
post #30
post #5

Japan being 68% forest is an astounding stat.

Still behind Finland (73.7%) and Sweden (68.7%) though and Laos (71.6%) as well. https://en.wikipedia.org/wiki/List_of_countries_by_forest_ar...

I don’t consider that a good Wikipedia article because it does a bad job distinguishing between natural forests and mono-/bicultural plantations of which there are vast areas of here. It’s quite like calling wheat fields ”grasslands”. Both fundamentally lack biodiversity.

Re: Japan is gripped by mass allergies. A 1950s project is to blame

#52
post #26

Interesting. I noticed that many people have hay fever in Japan, but I always just assumed it was genetic or something. I wonder if living there for a long time will make you more sensitive to pollen

I would assume it has more to do with less exposition to hay/pollen in urban areas, for instance in years in Beijing I've had hardly allergies since it is not exactly green, though I went to parks, but here in Prague right now with everything blooming it's nuts. Actually now that I think about it never head really problems with allergies even in Southeast Asia, though I was in very green areas, maybe humidity helps a…

I think the humidity has to play a role in that. Very dry air is not good for the nose even without allergies. This year the spring is very dry and also quite cold in Central Europe which makes things worse.

Re: Japan is gripped by mass allergies. A 1950s project is to blame

#53

Hmm, most German forests are also vast monoculture 'tree farms' and have been for the last 250 years (also caused by large scale deforestation in the centuries before). In the Ore Mountains we also have those yellow clouds of pollen coming off spruce trees every few years, covering everything with a thin yellow dust layer, yet I'm not aware that the number of people with pollen allergies is exceptionally high (oth, m…

I moved to Germany as an adult from a completely separate biome, and I’ve got terrible problems with allergies I never had in my home country

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Re: Japan is gripped by mass allergies. A 1950s project is to blame

#56

Hmm, most German forests are also vast monoculture 'tree farms' and have been for the last 250 years (also caused by large scale deforestation in the centuries before). In the Ore Mountains we also have those yellow clouds of pollen coming off spruce trees every few years, covering everything with a thin yellow dust layer, yet I'm not aware that the number of people with pollen allergies is exceptionally high (oth, m…

Germany has half the percentage of forest as Japan

Context:

Germany, area 357,022 km2 (137,847 sq mi) water 1.27%

Japan, area 377,975 km2 (145,937 sq mi), water 1.4%

Re: Japan is gripped by mass allergies. A 1950s project is to blame

#58

“Arboreal sexism” is a similar phenomenon: We prefer male trees in cities since they do not produce fruit that drop on the streets. The result is a much higher pollen load.

That's not actually a thing. Very few trees we plant have specific male vs female plants. One of the few that does that gets brought up in this context, ginko, tends to have male trees preferred because the fruit kind of reeks. Ginkgo fruit is also toxic so you really don't want masses of it getting washed into local waterways in ecosystems the tree isn't native to - not a great time for the local wildlife. A significant supermajority of all the rest of the trees that you plant in cities are gonna have male and female flowers on the same plant or male and female structures within the same flower.

Re: Japan is gripped by mass allergies. A 1950s project is to blame

#59

Earlier quoted context omitted.

Pollen allergies have definitely skyrocketed in Sweden. We used to be able to sit in an office and work all year without hearing people sniffle and sneeze. Now it's like an epidemic, at least half the office is affected.

Probably we can blame higher hygiene standards, or some other environmental factor for it. Forests haven't changed much in past decades. Here in Finland I've never been affected by any kind of tree pollen at all, but somehow timothy grass pollen gives me horrible symptoms, forcing me to take antihistamine most of the summer. I lived my childhood near farmland and forests, so definitely got exposed to both forms of po…

Yes timotej is my allergy as well.

And I got it as an adult, in 2009. So 26 years without any allergies, then suddenly, one summer in Helsingborg, the air was thick with pollen. I remember the smell was like cheese doodles in the air, musty.

Once I got back from an errand in the city my face was leaking, I walked to the pharmacy with blurry vision to get my first antihistamines. Ever since then every year june is a nightmare. It affects your sleep, so it affects every part of life.

And since then I've observed more and more pollen allergies around me, friends, co-workers, strangers on the bus. It's very prevalent.

I would not be surprised if humans caused this somehow with our modern city planning.

Re: Japan is gripped by mass allergies. A 1950s project is to blame

#60
post #31

Hmm, most German forests are also vast monoculture 'tree farms' and have been for the last 250 years (also caused by large scale deforestation in the centuries before). In the Ore Mountains we also have those yellow clouds of pollen coming off spruce trees every few years, covering everything with a thin yellow dust layer, yet I'm not aware that the number of people with pollen allergies is exceptionally high (oth, m…

The spruce and other local conifers (I live by the Bohemian Forest/Bayerischer Wald) have pollen that seems to be low allergenic by design. I know a lot of people who are allergic to birch or weed pollen, but not to spruce.

By design? Who designed the pollen in those trees?
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