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Re:‘Vegan spider silk’ provides sustainable alternative to s... by mytailorisrich on Thursday June 24, 2021 @06:46AM (#27615907)
> Something I don't fully understand is why single-use plastics are still in use.

Because it's not so simple to replace them in the supply chain, taking everything into account.

I am also not convinced that there really are better alternatives in term of pollution in all cases. I think analysing the pros and cons fully in the complete chain (e.g. from mining to disposal of waste) is also complex.

For instance: Is a thin and light plastic used once and incinerated in a state of the art facility (that might produce heat/electricity in the process) necessarily worse than re-useable glass that is much heavier, may require more energy to produce, and require energy and resources (including water) to re-use? (I take this example because there seems to be a revival of glass bottles and containers as a green alternative to plastic) I don't think this is a simple question and it touches on many things including how energy is produced, whether plastic is produced from fossil fuels or not, etc.

Moreover, do we necessarily need an alternative to single-use plastics, or would different plastics (fully compostable, sustainably sourced, etc) fit the bill?

It seems to me that "let's ban all single-use plastics" is a simplistic approach in a world that likes simplistic "solutions".

Re:‘Vegan spider silk’ provides sustainable alternative to s... by jamil7 on Thursday June 24, 2021 @08:27AM (#27616504)
> For instance: Is a thin and light plastic used once and incinerated in a state of the art facility (that might produce heat/electricity in the process) necessarily worse than re-useable glass that is much heavier, may require more energy to produce, and require energy and resources (including water) to re-use?

I would also like to know the answer to this. In Germany certain glass and plastic bottles that work with the deposit system (Pfandsystem) are washed and refilled directly (up to 50 times for glass I think) rather than going through a more complicated recycling process. I would have to imagine this is better than manufacturing a plastic bottle and burning it? When I try to find comparisons for this online it's often comparing a recycling process in which the glass is broken down and remade. If anyone knows I'd love to learn more.

Re:‘Vegan spider silk’ provides sustainable alternative to s... by tharkun__ on Thursday June 24, 2021 @12:38PM (#27620087)
I don't remember exactly but I think it was a Quarks&Co waay back that compared glass bottles in the Pfandsystem with plastic ones and plastic ones that don't get reused IIRC. But don't quote me on that, try to find the episode :)

What I do remember is that it's not actually as clear cut as one might think. They also accounted for the fact that glass is much heavier and thus you need to use more gasoline to ship it around (from the bottle producer to the bottling plant, to the stores, to you, you bring it back to the store which ships it back to the bottling plant to wash and refill and so on. And then you can not reuse it indefinitely either. A hard plastic reusable coke bottle is much lighter and can be reused a lot of times in the same manner. I remember seeing a lot of them where you could tell from all the scratches and such. Especially on the bottom.

Related but not plastics: another probably Quarks&Co episode compared apples from Australia shipped to Germany vs. local apples. According to their calculations it was actually better for the enviro ment to ship fresh apples from Australia to Germany than to store local German apples and sell those at some point. Some point because of the amount of resources needed to store local apples in order for them to stay fresh that long. So at some point during spring/summer it starts being better to ship them from Australia.

Re:‘Vegan spider silk’ provides sustainable alternative to s... by jamil7 on Thursday June 24, 2021 @02:47PM (#27622150)
Thanks for the thoughtful answer. I will check out those episodes. I have actually heard the thing about certain fruit and vegetables making more sense to buy from overseas than from cool storage. I guess ideally you only eat seasonal food but that leaves very little in the way of fruit and vegetables in German winter.
Re:‘Vegan spider silk’ provides sustainable alternative to s... by tharkun__ on Thursday June 24, 2021 @06:19PM (#27624603)
Especially since you nit only need cold storage. You also need to have a special atmosphere, not just regular air. That's not needed when you store your own apples over winter in cold storage because you don't need to keep them in saleable condition. But nobody buys apples that look like that, even if still totally edible and awesome for pie :)

Way less fresh stuff than we are used to nowadays, yes. But not too bad nutrient wise actually.

Germany being well suited to cabbage for example, making Sauerkraut both gives you lots of fibre and lots of vitamin C. It also stores so well that you can eat it well into the part of the year where you will have fresh veggies. It has lots of good bacteria that help your gut microbiome.

Carrots apparently store well in low tech ways too, like in wet sand preferably in a root cellar.

Most fruit nowadays are eaten for taste, not nutrients and/or people just live in the city so that the low tech ways just don't work any longer. Never mind not knowing about them either.

If you are looking for something else in this direction I totally don't remember the name and its probably 20 years old by now but I remember watching another show where they had a family live on an old farm like they would've more than 100 years ago (at that point). So they did make Sauerkraut for example. Multiple large crock pots full and all that. Not easy, not as nice as today. But what I've been thinking is that with just a tiny bit of modernisms but then also using this "old knowledge" we could all do way better for the environment. E.g. having sugar easily and cheaply available as well as lemons and pectin in packages and pressure bath pots is great. Makes awesome, safe to eat (botulism) jam from all this fruit.

Another great way in case you aren't doing it already: Rumpott. Big glazed clay pot that you start filling with with spirits such as rum and as things become available you put in things like strawberries, cherries, currants and/or plums. Not necessarily mainly used for preserving the fruit but awesome nonetheless around Xmas time (or any time during the cold months).

Re:‘Vegan spider silk’ provides sustainable alternative to s... by bushbaba on Thursday June 24, 2021 @07:59AM (#27616321)
When I buy rice at the store. It’s in a plastic bag.

This is totally in necessary. It could be in a paper bag or even a bulk-bin.

I think banning the majority of single use packaging would go a long way at reducing our waste.

Re:‘Vegan spider silk’ provides sustainable alternative to s... by simtel20 on Thursday June 24, 2021 @08:09AM (#27616386)
In most of the world, bulk containers of grain equal insect infestation. If there is not enough turnover fast enough, there is also the potential for going stale, mold etc. So there is a need for packaging so the age and condition of a discreet quantity can be evaluated and if needed disposed of without infecting the total quantity.

In addition many plastic packages allow you to see the condition of the grains inside the package, and will maintain the inefrety of the packaging, not degrading when you store them in relatively easy to create dark and cool conditions.

I do hope there are other materials that can replace plastics, but they will be adopted more rapidly for grains, at least, when they can satisfy these needs at least. Stores won't have good reason to switch how they sell these things until they do.

Re:‘Vegan spider silk’ provides sustainable alternative to s... by dopidopHN on Thursday June 24, 2021 @08:32AM (#27616564)
It seems like we were able to store grain without plastic container for a long period of time.

My limited understanding is that plastic is more convenient and we’re used to this convenience at this point.

Re:‘Vegan spider silk’ provides sustainable alternative to s... by simtel20 on Thursday June 24, 2021 @08:44AM (#27616667)
> It seems like we were able to store grain without plastic container for a long period of time.

Bulk (industrial/commercial) storage is pretty much free of plastic from what (admittedly little I understand). However for quantities that people like you and I - normal people in non-industrial settings - this was not solved well before plastics or else plastics would not be in common use, mostly for the reasons I described above.

> My limited understanding is that plastic is more convenient and we’re used to this convenience at this point.

If by "convenient" you mean it makes it possible to measure and sell a given quantity without having to constantly expose the grain to insects and adverse environments, then yes, but that's not usually what I'd call convenient, it's an essential factor in how its distribution is managed.

Re:‘Vegan spider silk’ provides sustainable alternative to s... by dopidopHN on Thursday June 24, 2021 @07:28PM (#27625244)
I mean… we were moving grain around before the invention of plastic, no?

Let’s say around WW1 time. It’s post industrial revolution, but before plastic.

What’s wrong with glass? Painted glass if light is a issue.

Or metal can for unique use?

Heck. Terracotta or whatever that’s called in English worked for millenniums, no? It can seal good enough.

I know nothing about the subject. But I do like glass container a lot so that what I use at home.

I have large, medium and small ones. Some are dark for stuff that don’t like light.

I live in a place build on cockroaches, and they don’t get in.

But I kinda see your point in term of logistic / distribution…

But I persist : I think we became lazy. People could bring their empty container to the shop and fill them.

But… that’s a tiny use of plastic I guess ? That shit is so convenient and handy. We should use it for exceptional occasion rather than being that cheapo disposable material.

Edit : Re: mesuring. I’ve been to hippie shop where if you bring a outside container, they tar it before pouring the exact quantity of lentil / rice / whatever you decided to buy that day.

If you need 200g only you can. If you want 2kg, here you go.

Witch remind me: those big ol bag of the depresssion era for flour? They seems to work fine. Same for the 5kg bag of rice in fabric you find in « ethnic » store

Re:‘Vegan spider silk’ provides sustainable alternative to s... by dehrmann on Thursday June 24, 2021 @12:40PM (#27620107)
But by mass, the plastic bag is an incredibly small portion of your purchase. Plastic getting into the ocean is a valid concern, but beyond that, the rice bag is a pretty negligible concern compared to the rest of your lifestyle.
Re:‘Vegan spider silk’ provides sustainable alternative to s... by sva_ on Thursday June 24, 2021 @09:02AM (#27616836)
In the case of rice, you'll sadly quickly be dealing with these little critters:

https://en.wikipedia.org/wiki/Rice_weevil

Re:‘Vegan spider silk’ provides sustainable alternative to s... by robertlagrant on Thursday June 24, 2021 @07:44AM (#27616216)
Perhaps one issue with any plastics is they are generally made from a finite resource, whereas energy and water can be more sustainable