All Questions

6
votes
1answer
216 views

Is a sump tank necessary for my proposed aquaponics system?

I am designing an aquaponics system for my basement. I am thinking about one large fish tank approximately 3500 gallons. The grow beds will be above the fish tank and consist of twelve 45 gallon ...
4
votes
1answer
35 views

Large-scale test data on LED, CFL, and incandescent brightness and longevity

A google search for "comparing LED, CFL, and, incandescent brightness" returns hundreds of charts showing what equivalent wattage of LEDs and CFLs are to match an incandescent bulb. This is fine for ...
6
votes
0answers
33 views

Freezing Ice Pops Sustainably

When storing ice pops for retail customers, I need to package them in a freezer-safe ,clear wrapping. I would like for it to be compostable, but apparently the compostable cellophane options are not ...
6
votes
0answers
67 views

Are any large restaurant chains pursuing better alternatives to recyclable packaging?

Yesterday Kraft Foods announced that by 2025 all of its packaging will be recyclable. (Note that while they include "reusable" and "compostable" in the announcement, they talk almost exclusively about ...
5
votes
0answers
69 views

Solar cell phone charger a sustainable choice?

So I bought this handy and mobile solar charger for my cell phone. I wonder if it's a sustainable buy and looking for a report or similar that compares the production cost(carbon dioxide and resources)...
5
votes
0answers
89 views

Research on consumer behavior and waste management

I am teaching a class on waste management to students who are primarily environmental management masters students. For one of the sessions I plan to discuss the role of consumer/waste generator ...
5
votes
0answers
52 views

Which is more sustainable for eyewear/spectacles : Glass lenses or Fiber-plastic lenses?

I am about to get my first pair of spectacles. From where I am, glass lenses need a frame. Fiber-plastic lenses can be frameless. It's well known Fiber lenses are much more durable and longlasting. ...
5
votes
0answers
76 views

Should cardboard contaminated with unknown dirt be recycled?

Lately, postal cardboard packages have been arriving with an increasing level of exterior contamination with generic black dirt. Although the composition of this dirt is unknown, this can be a concern ...
5
votes
0answers
22 views

Which part of the process of estimating wind resource has the potential greatest benefit from further research?

Estimations of the potential generation resource of wind power happens at all scales from very coarse global estimates, to detailed estimates at individual sites based on specific locations and ...
5
votes
0answers
273 views

Bamboo fibre clothing (not rayon)

Are there any retailers selling clothes made out of naturally processed bamboo fibre, not the viscose/rayon (see here) method? I am talking of the alternative proposed in this answer: Apparently ...
5
votes
0answers
96 views

What is the Degrowth perspective on ad blocking and online advertising?

From a Degrowth perspective, how would one argue in favour or against ad blocking and online advertising? To give a perspective on Degrowth, Degrowth is a political, economic, and social movement ...
4
votes
0answers
46 views

Are machine-washed rags more sustainable than paper towels for any & all household messes?

Anything single-use is suspicious in terms of sustainability, especially if it goes to the trash afterwards and is not recyclable. Considering that, and the disproportionate use of paper towels by the ...
4
votes
0answers
43 views

How to manage a largish hugelkultur?

As part of the site clearance for the in-fill house I'm building at the rear of the section I have had to remove a 100 year plus old pine ( which the neighbour wanted to remove as he felt it was ...
4
votes
0answers
403 views

Ammoniacal Nitrogen (NH3-N) test and sources of ammonia in natural bodies of water

One parameter that's involved in water quality assessment is ammoniacal nitrogen (NH3-N), a measure of ammonia. Where does ammonia come from in natural water sources, such as a river? What factor ...
4
votes
0answers
87 views

What are the advantages and disadvantages of using lidars over sodars for wind resource assessment?

The process of wind resource assessment has used a variety of methods over the years; more recently, lidar - radar-style sensing using lasers; and sodar (similar, but using sound) have come to ...
4
votes
0answers
52 views

Any sustainability difference between anionic/cationic/nonionic detergents?

Are any of these three types of detergents more or less damaging to manufacture and/or use or dispose of than the others? I realise these are rather broad classes, but this is usually the only detail ...
4
votes
0answers
41 views

Pond for largemouth bass / perch

In NE Ohio (Zone 5 - 6) how large of a pond would I need to raise largemouth bass or perch for food production. What is the minimal depth and diameter required for 100 fish?
3
votes
0answers
27 views

Nike water bottle breakdown?

So many know that single use plastic water bottles break down with repeated use. Well the other day, I decided to buy a reusable water bottle. I am on a budget and picked up a Nike Hyperfuel 32oz. Its ...
3
votes
0answers
36 views

Roughly, how much water does it take to grow 50 lbs of fodder for most dairy cows in the US?

I'm looking for a ballpark number. Obviously fodder can include more than just one crop (e.g., barley/corn or hay/straw), and that's why I am having trouble finding a figure. Aside, I found that an ...
3
votes
0answers
52 views

Is there any useful recycling of fibreglass boats or other products made of it?

Lifetime is running out for a large number of fibreglass boats produced about 50 years ago. Many shipyards where they have been produced do no longer exist and last users frequently do not have the ...
3
votes
0answers
46 views

Are there any articles that describe to correlation between the forecast errors for renewable energy resources, depending on the distance?

In an article by Zhang et al., the authors describe how the (normalized) forecast errors of different renewable energy sources (like solar panels and wind mills) are correlated. To that end, they ...
3
votes
0answers
70 views

Environmental benefit of recycling small cables from electronics and holiday mini lights?

For electronics, I've watched some online videos explaining commercial shredding operations and some home based scrapper videos showing how they strip insulation from common household electrical ...
3
votes
0answers
62 views

Are talcum powder tins more sustainable than the ones that come in plastic boxes?

I was shopping and as a trial, I bought a talcum powder in a tin container instead of the usual ones that comes packaged in a plastic box. The material looks like a tin, although one cannot tell from ...
3
votes
0answers
68 views

What is the average net impact of a human on the sustainability of our habitat?

I've been writing an informal essay on the true cost of everything and as per the question asked at the end, I want to approximate the average human's impact on habitat destruction/human ...
3
votes
0answers
102 views

Which type of portable heaters are best suited to use in a static caravan?

I am looking for 2 portable heaters to use in a static caravan. One to go in the children's bedroom (safe to leave on at night), the other to go in the living room. Which types of heaters would be ...
3
votes
0answers
61 views

Relationship between number of public rubbish bins and MSW(municipal Solid Waste) among countries and areas

Is there any research really about the relationship between the number of public rubbish bins and MSW? Any studies about it? Do municipalities with less public rubbish bins tend to produce less MSW? ...
2
votes
0answers
19 views

What is the most commonly available eco-friendly writing instrument?

How would you rank the following in terms of damage to the environment: Pencils (regular) Mechanical Pencils Single-use ball point pens. Refillable ball point pens. Fountain pens The eco-friendly ...
2
votes
0answers
20 views

Efficiency considerations of forced air vs. hydronic central heating

For a building that is centrally heated by local fuel combustion (i.e. heating within the building rather than district heating), one may distribute the heat throughout the building using as a energy ...
2
votes
0answers
38 views

Is burning PVC with municipal waste 'acceptable' nowadays?

I started to write a comment under the question Is there an efficient way to dispose of credit cards? about the dangers of burning PVC, because this can lead to dangerous chlorine compounds in the ...
2
votes
0answers
44 views

Has anybody converted a bus from diesel drive to electric drive (hybrid) converting the old engine into a generator?

I am aware that the vehicle will increase weight and that older engines must be modified to operate with less harmful impact to the ambient. I rather wonder about the accompanying effects and ...
2
votes
0answers
30 views

Innovative design solutions to increase recycling rates among university students

I have an assignment to research innovate design solutions to increase recycling rates, in particular recycling rates among university students. I've found an excellent research report on topic (but ...
2
votes
0answers
44 views

Lead nano carbon batteries over Lithium?

The person quoting me on an off grid solution is suggesting lead nano carbon batteries instead of Lithium Ion or ordinary lead acid. Is this technology mature enough yet? And is this now the way to ...
2
votes
0answers
42 views

New Vehicle: do the cost outweigh the benefits?

Hello again sustainable living, Since it's summer break and I can no longer walk everywhere like I could at university, I've been having to drive my car a lot. For a 2001 model, it gets excellent gas ...
2
votes
0answers
70 views

What's required for hydroponic farming in a container?

I have a container of size L 1.8 m × W 1.86 × H 1.73. I am planning to turn this into a hydroponic container for growing cooking greens (salad etc.). The thing that concerns me is the stuff I probably ...
2
votes
0answers
58 views

What type/breed of animals do I want for food forest maintenance?

I'm currently building a food forest that I plan to gate in to protect animals. What type/breed of animals should I look into for keeping the forest floor clean?
2
votes
0answers
61 views

What is the Index of Sustainable Economic Welfare (ISEW)?

What is the Index of Sustainable Economic Welfare (ISEW) about? Does it measure the relation between energy and well being? Or does it have other parameters?
2
votes
0answers
611 views

How do trees absorb carbon dioxide?

How much of carbon dioxide is used in the first years of the tree, and how much in maturity? How much goes in the soil, and how much in the wood? What about the night? I live in northern Italy, and a ...
1
vote
0answers
15 views

Are there any good diy examples of home level STES or BTES

I just came across the concept of STES - Seasonal Thermal energy storage and more specifically BTES - Borehole Thermal Energy Storage. https://en.m.wikipedia.org/wiki/Seasonal_thermal_energy_storage ...
1
vote
0answers
30 views

When tape is needed for simple labeling, which tape is the most environmentally friendly?

When it comes to quick and temporary labeling of bins and storage things, a strip of tape written on can be very useful. Painters tape, masking tape, duct tape are all occasionally used for this ...
1
vote
0answers
45 views

Shortcut carbon emission trading by buying and sinking coal

Carbon emission trading is supposed to use market mechanisms to make carbon-intense processes less attractive. Unfortunately, the EU market is flooded with emission certificates, such that the ...
1
vote
0answers
64 views

Energy use for monitor vs pc tower

I work in a few schools where children have been taught to turn off the monitors to save energy. Unfortunately, this is all that they turn off. Every Monday morning I find 30+ computers running with ...
1
vote
0answers
93 views

What ecofriendly well paying jobs in deep learning are there?

I'm currently learning how to train and use neural networks, as I've heard getting into this field would be worthwhile from the people at https://80000hours.org/ Is there any application of this ...
1
vote
0answers
52 views

What is the environmental impact of recycling beverage containers, by material?

I just read the article "Oregon Launches First Statewide Refillable Bottle System In U.S.". Discussing the environmental impact of this system, the article says: Until that facility [in Portland, ...
1
vote
0answers
49 views

What are some office writing materials made from renewable resources?

My understanding is that many disposable pens use non-renewables like tungsten and polystyrene. Pencils use graphite which is carbon but can be depleted faster than it is used. What are the good and ...
1
vote
0answers
62 views

Home efficiency

Please comment on which design is more thermally efficient. They are roughly the same. The apt is 2' shorter on the out (left) as space is not need for stairs. It is a cooler climate with 70" of ...
1
vote
0answers
53 views

Estimating the power that can be generated by a tidal facility

This is a homework exercise I got: A renewable energy facility has to be built immediately under the Golden Gate Bridge. Estimate the time-averaged power that can, at the resource level, be ...
1
vote
0answers
37 views

What's the environmental cost of plastic per gram?

Imagine a person that is fine littering so long as they pick up trash elsewhere. How much would they want to donate to environmental organisations in order to offset the effect they have on the ...
1
vote
0answers
213 views

Is it correct in thinking that Constant (Continuous) Flow is NOT the same as Constant Flood?

So the long debated question of which system is better has already been argued and fought for a while now. This isn't that. See the end of this post for the direct question. In trying to determine ...
0
votes
0answers
6 views

Feed in Control for SMA STP 60 kW inverter

I just need to know whether SMA STP 60kW can be integrated with the feed in control methodology? or Zero Export methodology
0
votes
0answers
38 views

Who re-uses used but still good florescent aquarium light tubes?

I have 50 used, full-spectrum aquarium bulbs, which are still good, but not strong enough to support aquarium plant growth. Probably still very good for helping people with seasonal affective disorder....

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