The ones that fall apart like confetti are the biodegradable ones made from polymers like PLA and probably newer ones. Old plastic bags will last for thousands of years in the ground which could be viewed as an ideal form of carbon storage.
2012 ©. Content compiled by the Canadian Plastics Industry Association
Last year Britain's Environment Agency published a Life
Cycle Assessment of Supermarket Carrier Bags, which concluded that long-life
bags have to be reused a number of times if they are to be environmentally a
better option than standard plastic carrier bags.
For instance, if a plastic bag is used just once, then a paper bag must be
used three times to compensate for the larger amount of carbon used in
manufacturing and transporting it, a plastic "bag for life" must be used four
times, and a cotton bag must be used 131 times.
If a plastic bag is reused, of course, then its carbon footprint per use
decreases further - and the number of times the alternatives have to be used to
match this low footprint is multiplied.
No, that was never the case. Maybe something that this supermarket dit? Usually you go into the supermarket, put the empty cans and bottles in a machine and the machine prints out a receipt which you bring to the cashpoint. There you get your money or you can use it like money. Maybe they were giving the tramps those receipts because they didn't want to buy something and didn't bother to stand in line to get their money? Or it must have been something special to that supermarket...Did you used to need the reciept? The tramps were standing there collecting them as we left the supermarkets (till we emptied them of everything but non-alcoholic lager) - this was about 10 years ago mind you.
. I don't think I've ever seen a cotton bag that's been knackered beyond use so I'd really question that 51 times stat.
I've got a neighbour who's very good at being 'green'. We were talking about the bag 'tax' and she showed me her shopping bags which are all natural material bags and all over 10 years old. I use my cotton shopping bags daily to carry my lunch to work and for shopping (these were free bags btw) They've been washed and one has had a minor repair but they're showing no signs of needing to be thrown away. I don't think I've ever seen a cotton bag that's been knackered beyond use so I'd really question that 51 times stat.
Well if you question it, that must trump proper scientific research then
So its better that he uses a cotton bag and throws it away after 51 uses? Effectively increasing environmental damage by 150% overnight? Genius that. You shouldn't simply dismiss the most up to fate, independent research because it doesn't suit your entrenched position.
A logical next step would be to put a tax on cotton bags - £6.55 per bag would be proportional.
I'm fiercely against do-gooder nannyism - for things that should be a personal choice. Crash-helmets, seatbelts, drinking, smoking, drugs even - I disagree hugely with legal punishments, punative taxes or prohibition.
Litter affects everyone, utilizing a tax/charge technique shown to cause improvement, without major disruption or hardship to people, I'm all in favour.
Find me the facts behind that 51 use figure. As far as I can see that was a number plucked out of the air. Find me one person on the street who can say without doubt the number of times they've used the bag they're holding.
8.1.7 Cotton bag
The cotton bag has a greater impact than the conventional HDPE bag in seven of the
nine impact categories even when used 173 times (i.e. the number of uses required to
reduce the GWP of the cotton bag to that of the conventional HDPE bag with average
secondary reuse). The impact was considerably larger in categories such as acidification
and aquatic & terrestrial ecotoxicity due to the energy used to produce cotton yarn and
the fertilisers used during the growth of the cotton.
There are several other types of carrier, none of which have been considered in this study. These include woven polypropylene bags, jute or hemp bags and plastic boxes
Most paper bags are used only once and one study assumed cotton bags were used only 51 times before being discarded, making them – according to this new report – worse than single-use plastic bags.
The 51 re-uses is also mentioned in the Independent Dave
http://www.independent.co.uk/enviro...r-bags-not-ecovillains-after-all-2220129.html
Can you provide any reports, or evidence on total mean re-use?
Its not about "do nothing"
Its about not being a "holier than thou", not ignoring all the scientific evidence, not providing valid alternatives, and generally being utterly repelled by those who choose to interfere in a commercial transaction without compelling evidence.
There are far worse litter items.
If we actually wanted to reduce litter, the contents of those bags would be a better place to start than the bags themselves. Why does meat have to be wrapped three times? Why do we need tin cans, with paper labels, in cardboard sleeves?
Its a silly, feel good, badly thought through bit of legislation supported by misguided people who like to pretend they are ecologically minded whilst living on many, many multiples of the global average wage, burning ten times their fair share of fossil fuels and carrying a bag that is probably made in a sweat shop.