Jun 28
Green Issues Help me in my Jedi training as I confront Volkswagen's threats to Planet Earth http://www.vwdarkside.com/en/jedi/adrian-hollister-729

Posted by Adrian Hollister

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Apr 28
Green Issues Not too scientific this entry, but found a discussion at work in our sustainability forums asking " I've been looking for information about whether it really is more economical to use a slow-cooker than an electric oven or cooker."

This has been bugging me, so I've clamp metered a few different devices to get a rough idea of how much electricity was consumed in my house making similar foods (stews). Amounts were about the same and the idea is to feed my greedy family of 5 (soon to be 6!!)...

1. Slow Cooker. An average of 20W per person for the food cooked (using boiling water at the start)
2. Microwave. An average of 85W per person.
3. Slow Cooker. An average of 100W per person.
4. Electric Hob (ceramic). An average of 240W per person.
5. Oven (electric non-fan). An average of 350W per person.

2 was higher than I expected, but in the 'rest' periods between the two microwave sessions the microwave still consumed power cooling itself down and turning the turntable etc.
3-5 are hampered by longish warm up times and cooking times are the key differentiator between them - longer the cooking time the higher the consumption


Device: Microwave
Cooking Time: 30 mins (10 mins cook, 5 mins rest & stir, 5 mins cook, 5 mins rest & stir, 5 mins cook all at 70% power on a 850W microwave)
Total consumption 425W, 850W per hour , 85W per person (five people)

Device: Slow Cooker
Cooking Time: 8 hours
Total consumption 500W, 63W per hour , 100W per person (five people)

Device: Electric Hob
Cooking Time: 1 hour (mostly low power simmer, seems to be 2.2KW hob)
Total consumption 1200W, 1200W per hour , 240W per person (five people)

Device: Oven
Cooking Time: 1.5 hours (put into cold oven)
Total consumption 1750W, 1160W per hour , 350W per person (five people)


Anyone else done a similar experiment?

Posted by Adrian Hollister

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Mar 24
Green Issues The Leaf dubbed ‘the world’s first affordable, full production’ family, electric car has been available to order in the UK since September, with its first customers waiting until March 2011 for delivery. Two such customers have finally got their cars, read the full article.

It's a fascinating problem isn't it. Those who live in towns are likely to reap the biggest benefit of such as car, but I suspect that many wouldn't buy one just on the off-chance that they might make a longer journey once every year. Those who live in rural areas will be too scared to have one - after all, there might not be enough charge to get somewhere (and back). Until we have an integrated transport strategy, very limited range cars will always have a problem. If people thought that they could drive to a train station and comfortably get where they need to do, they would probably do it - even in rural areas; but at the moment a good percentage of the population has never or would never travel by train/bus as they are car centric.

For cars like this to make mass market they either need to improve the range (or options for recharging) to compete with existing car stock, or we need to reinvest in our transport strategy. But heavy investments would be required to change our car centric people into trains/bus users and I'm not sure any political party has the will to attempt this in one go - especially as the state of our public transport is poor at best.

Posted by Adrian Hollister

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Jan 7
Green Issues Christmas has come and gone and give or take we have been good with our recycling. We've not used anything we haven't needed to use and we have reused everything we can (amazing how present boxes can be turned into play kitchens, dens and a whole bunch of other things for the kids). This year I also separated the different types of waste when presents were opened - largely wrapping paper, cardboard and plastic bits.

The bit we failed on this year is the food. Whilst the dogs did their best to consume anything meaty, smelly or windy (why do my dogs love brussel sprouts?); we are missing the chickens. They did an excellent job of consuming all of the bread, veg, rice, pasta, and to be honest just about anything passed their way; and, of course, there is only so much you can give the wild birds without attracting hoards of mice, rats and other nasties into your garden.

So for the first time in ages we are actually putting food waste into the bin. Next on the shopping list must be some more chickens.

Posted by Adrian Hollister

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Dec 21
Green Issues The cold may be endangering for some, annoying for others, great fun for kids and the rest of us; but there is a clear advantage of all this snow. Go along a row of houses and you can see which ones don't have any insulation. Seriously try looking up at the roof line and follow the levels of insulation. I am surprise quite how many are snow free - melted due to heat loss from the house. Heading from Newbury to Reading on the train was amazingly interesting. Terrace houses work especially well for this little game as there is always one in a long row of them with a snow free brown roof. So go outside and look at your roof - white usually means you have good insulation (or no heating!), partially or fully melted snow shows how much of your household heat is heading out through your roof. A few quid spend now on insulation will add significant benefits to your heating costs and will do your bit for the environment and the sustainability of our fuel sources. Check your local energy companies for insulation offers.

Posted by Adrian Hollister

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Nov 11
Green Issues I've been using shredded paper for the chickens nesting box, it's freely available (with all the darn junk mail) and people pop it around when they come. It composts well (especially when covered with chicken poo) and works well when covered with anti-mite type powers. I've just been given a rather big bag of dried hemp 'chippings' so decided to switch over to using it. So do the chickens like hemp bedding?

The quick answers is that the chickens seem to love the stuff. I've not had a single broken egg and they have dug some nice nests in the stuff. Also cleaning out is easy as the hemp clusters around the chicken poo - this results in easy lumps that can be removed without mess and put straight into the compost bin. The nearest product I can find that I can purchase is used for horse bedding (http://www.hemcore.co.uk/bedding.php) - doesn't look exactly the same but I will give that a go as well. It's also a lot cheaper than sawdust and with the built in citronella it should keep the flies away in the summer.

Posted by Adrian Hollister

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Oct 14
Green Issues I seem to have a feather pecking problem with the chickens. Looks like the solitary black rock is being picked on by the ex-bat chickens. Might have to either isolate the ex-bats or find another plan B as I don't like the look of a poor ole black rock with feathers missing on the back of her neck. I do wonder if the pecking behaviour is inherent for birds that have been brought up in small busy cages with little free space.

Posted by Adrian Hollister

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Oct 8
Green Issues Animal Aid have exposed the abuse of animals in their before their slaughter. The Guardian has good coverage of the abuse and a rather sickening video. I've seen a lot of 'we must tighten up laws' on twitter around this issue, but the real thing we must do is tighten up our morals. These people should not be compelled in any way to want to do these things, and I'm certain consumers would not want a product with 'we treat animals with great cruelty' stamped on the box.

You can find the animal aid web site here: http://www.animalaid.org.uk

Posted by Adrian Hollister

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Jul 27
Green Issues I gave the willow a good trim over the weekend and with the help of a friends shredder reduced the massive volume of cuttings into big bags of willow chippings. I know willow burns well when dried, so it can start the drying process in the chicken pen. Their scratching and digging through it should also help the drying process.

I've filled their run up to about six inches deep with the stuff and clearly they are enjoying every minute of it. With a summer like we are having the majority of the green stuff should be dried off within weeks.



This is a small scale experiment, but on a larger scale I would hope to be able to fill the run every month in summer and rotate the chicken 'dried' stuff into a green house or similar hot place for further drying. Not sure how or if this is going to work, but it's worth a try especially as willow is so cheap and grows so fast.


Posted by Adrian Hollister

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Jul 8
Green Issues Recently brought up in the press again is the use of plastic in tea bags. Modern tea bags from the big brands use between 10-30% plastic in their bags. This, of course, is not compostable and won't bio-degrade quickly in your compost bin. Twinings, PG, Lipton and Tetley appear to be some of those brands who have been identified as using plastic in their tea bags. Given the very high price most people pay for tea and coffee in canteens and cafe's, shouldn't we be getting the best product available? Should we be worried by any chemical leaked from the plastic when immersing this plastic in boiling water?

Companies like Tea Pigs sell tea in bags that will fully degrade in the standard compost cycle. They are expensive compared to supermarket tea, but outside of the home our drinks are not exactly cheap. Perhaps a switch a switch to 'better for us all' tea bags would be a good idea and could be done in conjunction with a home composting campaign by the offending tea companies.

Posted by Adrian Hollister

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