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231 views

Does a PV panel take more energy to build than it generates in its lifetime? [duplicate]

Industrial energy costs are $1 per million BTU (MMBTU) or 300kWh, or $3*10^-6 per watt hour (Wh). http://www.eia.gov/consumption/manufacturing/ Solar has 1 kg of 9n silicon per 100W, at $20/kg. ...
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1answer
523 views

Biodegradable paint for short term use

I attended a protest against the TPPA today and found myself wondering about what biodegradable paint might work nicely for short term use, such as for a cardboard placard. A similar use for such ...
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2answers
68 views

Solution to zero-waste take-away cup containers?

The most common sustainable solution for soup takeaway (to-go) containers are those compostable cup and lid sets - made from plant-based plastic (PLA) lid and a paper/PLA cup. These are basically non-...
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1answer
31 views

EU Real Driving Emissions testing (RDE) - does it factor in real driver behaviour and the inefficient driving habits they often exhibit?

Drivers often floor it at the lights, a large number switch off their start/stop systems, they might idle for an hour to listen to the radio, exceed the speed limit and exhibit other inefficient ...
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2answers
85 views

Paper packaging once a day or plastic every second day?

I buy a lot of cottage cheese. There are two kinds of packagings available: paper wrappings, which I buy one piece a day plastic bag, of which one pack is enough for two days Assuming that I can't ...
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2answers
99 views

What percentage of LDPE Type 4 plastic that you hand in to be recycled is in fact recycled?

What percentage of LDPE Type 4 plastic that you hand in to be recycled is in fact recycled into something useful? I ask this because I read that China stopped accepting plastic to be recycled ...
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1answer
44 views

How is amount of wood measured?

There has been some confusion here related to measurement of amounts of wood. There are at least the following units of wood measurement: loose cubic meter of wood stack cubic meter of wood solid ...
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1answer
153 views

Is it possible to harvest energy from the storm?

My idea of a device for harvesting energy from wind If used in reality, this device will harvest significant amounts of energy from wind, waves and storms. This not only solved the problem of energy ...
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2answers
88 views

Ongoing source of distilled/filtered water for humidifiers

My family has several table-top humidifiers (the cool-mist/nebulizer kind) in the house that we use a lot during the winter. Distilled water is recommended for using in humidifiers because the ...
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2answers
88 views

Which appliance should I replace first?

I recently bought a home with many appliances approaching 20 years old. As I expect that many of them will fail over the next several years, I want to get a head start on replacing them (since last-...
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3answers
146 views

Mindset change in developing countries

I've travelled a bit in Africa, Middle East, and Asia. What strikes me, in all of these places, is that often in the most poverty-striken areas, things that people look up to are big cars, and ...
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1answer
57 views

Safe weather tape for insulating windows

I just purchased weather tape for my windows, but after seeing a proposition 65 warning label of carcinogenic materials on the package I intend to return it due to safety reasons. The warning is ...
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1answer
46 views

Organic or Homemade equivalent White board Cleaning liquid & scrub?

We have some white boards where the ink has dried. I am sure there are commercial cleaners out there, but I am looking to find something: Liquid: Organic/ Edible - Maybe as natural as a fruit/ ...
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1answer
78 views

What is the difference between Geothermal HVAC and Heat pump?

What is the difference between these two renewable energy air conditioning systems?
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1answer
52 views

Can I use new electric oven to protect kitchen plumbing

It is 9 degrees and front room space heater has quit. Thinking of taking kitchen space heater to front room and turning new elec oven on to protect plumbing. BRRR
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2answers
546 views

Can an enclosed Pelton Turbine be used as a pump?

Can an enclosed Pelton Turbine be used as a pump, perhaps through the centrifugal forces created in a enclosed Pelton Turbine when it rotates at speed? The water striking out of the buckets of a ...
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1answer
34 views

Solar air heater inside the window?

I have an older Solar Venti solar air heater that's supposed to be installed on the roof, or on a wall. For various reasons it has not been installed .. lack of a suitable location. As it just ...
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3answers
73 views

How can an architect design a building to reduce landfill usage by occupants?

I'm currently working on a project with an organization that has four major goals for all of their facilities: Reduced energy usage Increased solar energy use Reduced water consumption Reduced ...
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1answer
42 views

Could multiple ram pumps be used to fill a watertower for a pico hydroelectric system?

Since a watertower stores potential energy just like a reservoir does for a hydroelectric dam, could I use that to power a pico (<5kW) hydroelectric system for my homestead? Now, I have read that ...
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1answer
35 views

In what type of location is it likely to find larger or smaller amounts of ozone?

I've been looking at some air quality monitoring results for ozone and trying to understand why there is such difference between locations. Near busy roads, the sea, near factories? I am quite ...
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2answers
82 views

Are there any unsustainable supply-chain issues unique to hydrogen fuel cell vehicles?

I was recently reading that lithium mining for electric vehicle batteries is wreaking havoc on deserts in Chile. One proposed alternative to EVs in the search for a replacement for petroleum-fueled ...
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1answer
316 views

How could I use egg yolk from boiled eggs?

Both my wife and I avoid eating yolk (as much as possible). I know I can find some uses for raw yolk but I am not sure if the yolk from boiled eggs can be put to good use, other than forms that ...
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1answer
364 views

What is the typical embodied energy of a solar photovoltaic panel?

What is the typical embodied energy of a solar photovoltaic panel, in terms of nominal power output or panel area? The ideal answer would be in kWh/WP, but kWh/m2 would also be acceptable. I ...
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3answers
59 views

Any succesful initiatives for packaging material reuse?

I find that we are having more and more things delivered as opposed to buying in stores. This winter a few cardboard boxes with 10kg of oranges, several books, and just this week a fridge. I was ...
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2answers
83 views

What are the concrete impacts of not recycling textile?

By 'concrete impacts' I mean hard data for example: CO2e emitted, harm to the ecosystem, resources depleted, cost to the economy, etc. I have a piece of clothing that is broken that I want to get rid ...
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1answer
146 views

How many Kilowatt hours of heat does a 4000 sq-feet McDonalds emit on a typical day?

If I recycle the waste heat emitted by a Mcdonald's, can a well-placed Mcdonald's take the place of a community heating boiler?
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1answer
255 views

How can I form heat sinks from waste aluminum?

I am designing a thermo-electric generation system that would generate electricity from the heat of my wood stove. The active components are bismuth telluride TEG cells that use the Seebeck effect in ...
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1answer
77 views

How to encourage turkeys onto my land without encouraging other wild life?

I am a homesteader. When I first moved to my property, I started a gaggle of turkeys and for about two years regularly fed them in the morning. It was nice because my kids got to see them and around ...
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2answers
135 views

How do I properly colonize trees to work together in a food forest?

I'm building an agroforestry (food forest) area in the yard, and was wondering how to exactly lay out the plants so they work well together. I'm putting in: Aronia X2 American Persimmon X2 Red ...
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1answer
77 views

The most efficient residential water treatment?

I live in a city that is going to ration water so i want to be nearly independent with my water and only needs to add more water on the system eventually. The water i get from the grid is already ...
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1answer
67 views

What is the most sustainable choice for a domestic hot water system?

We currently have an ailing 14 yr old solar hot water installation. A few plumbers have given us the same story: due to the age and general condition of the system, it makes more sense to replace it ...
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1answer
39 views

Source for share of renewable energies in the electricity production of Europe

I am looking for a source that shows the development of the shares of renewable energies in the electricity production in Europe. I only found statistics about the share for the end energy consumption ...
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2answers
85 views

Subsistence hunting and fishing in Alaska?

My entire family and I are all planning to move to Alaska in early April, and I'm looking for areas where it is closer to be able to do subsistence hunting and fishing, with land we can buy to build ...
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2answers
54 views

How can I tell if my light is insect friendly?

This time of year, on my commute home through the forest, I need a bright headlight for me and other humans (and some wildlife) to stay safe. However, research suggests that night lights kill many ...
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2answers
31 views

Book recommendation on traditional, pre-industrial homesteading

I am looking for references which document and explain how to do things without using electricity and all industrial technology. If you have read "The way home" by Mark Boyle, this would be the sort ...
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2answers
84 views

Why do people buy carbon credits? [closed]

I have been reading about carbon offsetting and people or companies doing this by buying carbon credits. People give money to people to take care of natural asset (like Earth token and the Natural ...
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1answer
71 views

What actually happens to LDPE Type 4 plastic when it is recycled?

When LDPE Type 4 plastic used in plastic wrapping is recycled, what is it used for?
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1answer
55 views

How to source sustainable/ethical meat?

There seem to be a lot of resources out there for sourcing sustainably/ethically grown vegetables, but many of the ones I can find seem to be aimed primarily at vegetarians/vegans, and so don't have ...
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1answer
41 views

Are pure or modified sine inverters different?

Just starting my power closet to power my off grid mobile home I've come to question everyone that I belive would know with no concrete answer Is there a difference between using a modified sine or ...
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1answer
109 views

What do the different rules for photovoltaics feed-in mean?

When researching about photovoltaics feed-in to grid options in my area, I came across various terms: net metering, feed-in limit, zero export / zero feed-in, solar smoothing. Can somebody explain ...
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1answer
128 views

Is it feasible to use constructed wetlands for greywater treatment in places where lakes freeze for more than half of the year?

Let's say village-sized community discharging grey water from shower water, human and animal wastes and laundry water. These villages use modern detergent and medicine (especially antibiotics), have ...
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1answer
588 views

How do I aerate a small 3x5 meter pond without using any electricity

I am looking to build a small natural pond (no filters or pumps) in a polytunnel. The last step in designing this is the water aeration method. I've seen various options for solar-powered aeration ...
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1answer
63 views

Mechanical damper built in to vent fan?

Are there any bathroom fans or range hood fans that have a mechanical damper built in that fully seals when the fan is turned off? In other words, it shouldn't let any air in OR out when the fan is ...
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1answer
119 views

What is a good examples of a sustainable writing ball-point pen?

What are the design principles of a sustainable writing ball-point pen? Is there any academic work or industry standards on sustainability of writing ball-point pens?
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2answers
66 views

Photo voltaic panels string of 3 kW setup

Am considering installing 3 kVA pv system on my roof top. I am to use a string system on a single inverter. My choice is : 12 by 250 W =3000 W or 10 by 300 W =3000 W Space is not an issue. ...
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1answer
213 views

Connection between crafts culture and sustainable practices? [closed]

Is there any connection between the depth of craft in a culture (meaning how common it is for lay people to engage in craft and deep traditions of craft) and the prevalence of sustainable practices / ...
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0answers
32 views

Are soybeans mainly grown for animal feed or oil production?

In the great vegan vs. non-vegan environmental debate a big point of contention is the topic of animal feed. Vegans argue, that a large percentage of agriculture, namely 98% of soy production should ...
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0answers
35 views

Solution for reducing volume of plastic recyclables

I've been having issues with my indoors storage solution for plastics. Loose wrappers and containers from food products tend to take an unnecessarily large amount of space and without a way to ...
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0answers
34 views

Grass rug/carpet sustainable alternatives?

My balcony has a very ugly concrete floor that I don't like. I really like grass carpets (see a few examples on Amazon) though. I like their texture and I think they make a balcony more homely. To ...
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0answers
37 views

Solar setup for well pump

The electricity where I live is pretty expensive at about almost 30 cents a KWh, so I'm considering setting up a solar system. I got 3 100 Watt Polycrystalline solar panels a while ago, pretty cheap. ...

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