Gotta wonder if the amount of energy spent on properly cleaning and sterilizing them during wash is any less than what it takes to crush, melt, and re-blow. Plus if you want to not throw all the nicked, cracked, and broken ones into landfills, you have to build the crushing and melting and re-blowing line anyway. I'm not sure "sadly" actually applies here.
Well, if this were to turn into an argument (it won't) you might win if that's your aim. Possibly more on societal sentiment than fact, maybe fact is skewed differently in the US duecto large distances and less standardisation and absolutely no re-use infrastructure in place.
Overall it's a complex mess where the energy to clean is a small but not negligible part in the equation.
German experts seem to have determined that plastic multi use bottles (the thick, sturdy kind that doesn't really exist in the US) is slightly better in the overall balance of things than reuseable glass bottles - in Germany that is. That's in a system where almost all multiuse containers actually do stay in the system for re-use - due to the refund you get upon returning the empties and due to the quire good infrastructure in placecto recapture it (everyone selling has to also take back. That number is based on the assumption that both get transported the same distance on average... which they learned is incorrect. Pkastic seems to travel further due to the distribution system of discounters (think Aldi etc) and that is not yet reflected in the math.
As is, they think glass bottles are re-used 50 times on averages, the thick reuseable PET bottles are reused maybe 25 times. Washing between the two may be a wash. Glass is heavier and thus costs more to transport (twice, to the customer and back to the producer) each time. So, if distances were the same the with the reuseable PET bottles as with glass (but they are not), they figure the reuseabke PET bottle saves about 0.7kg of oil (and it's unclearvti me if yhat's over 50 re-uses (so 2 PET bottle lives) or what, but I assume so. But with the larger distances they see that likely is lost again. Also that comparison does not account for what some might think is going on chemically and how that may affect taste or whatnot.
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One way PET bottles don't stand a chance in the energy balance they (them experts) compute (again, Germany, not the US - shorter distances, real systems in place). Too many losses, even so you get a refund upon returning too, but often smaller. Most of the losses are due to new material having to be added in not insignificant amounts and duecto colored material often only being good for textile fibers.
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Now, in a big place like the US with practically no re-use infrastructure in place and zero will to change that the math will look very different. We may disagree here, but I do see that as "sadly"... and without question so.
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Re-use, where actually institutionalized works very well at very, very high percentages. Without real uniform systems in place it won't work.
Recycling on the other hand is a bit more myth than reality. In Chicago I just recently heard, the actual recycling rate is that dismal 9 or so percent of households do it and the nationwide average is said to be a still dismal 35 percent. And that I think is talking about recycling waste collection. How much of that actually is recycled (not shipped to China or Africa.. or burned or landfilled anyway) may be another story. I don't think anybody could say that single use, even with the best recycling going on stands a chance in how environmentally friendly it is against well implemented and institutionalized multi-use. Not even remotely close. Again, we may differ, but that's what I arrive at.
And if course we all dislike waste, these days even or maybe especially plastic waste, but we just don't do anything really besides "out of sight out of mind" in oh so many forms.
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Anyway, with multi-use plastic bottles in a good and firm re-use system, while oodles better than single-use plastic, still, what happens to the material after 25 uses? It has to go somewhere... Is it really transformed into energy by burning clean and filtered? Or where does it go?
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And of course if only we could source our beer or water from say mostly up to 100 or even 200 miles away or so and not 1000... or from across an ocean... that might help... it's heavy stuff...
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Anyway, you heard lately of the big world wide environmental problems we are about to face due to glass waste after those mukti-use glass bottles get finally molten down? No? Me neither? Wonder why...
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Plastic on the otherhand does seem to win that battle. Big time... Another "sadly" in my book...
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No time to dig for sources... first two I came across:
https://www.google.com/url?sa=t&sou...FjACegQIEBAP&usg=AOvVaw0ajQXpTJHBcb4L3whAf15q
and
Plastik oder Glas?: Welche Flaschen sind umweltfreundlicher? | BR.de
(not the best source, but a start, may need to use google translate)