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3
votes
2answers
77 views

How feasible is a city with no cars and no streets?

Saudi prince, Mohammand bin Salman, announced a future city spread in 170km with no cars and no street. But any place to meet daily needs like schools, medicine and office will not take more than 5 ...
3
votes
1answer
57 views

Is the drain-off water from water purifiers fit for gardening?

I have 3 stage water purifier installed at my home which first filters the water, performs reverse osmosis and then treats it with UV-C rays. The water that is released at stage 2 (RO) is usually ...
2
votes
1answer
52 views

Can furnace condensate water be used for houseplants?

I recently had my old, broken furnace replaced with a high-efficiency condensing furnace. One function of this furnace is that it extracts enough heat from the exhaust gases to condense them into ...
20
votes
5answers
7k views

Why is there no spring based energy storage?

I'm wondering about kinetic energy storage for homes. Imagine a concrete plate resting on hundreds of firmly attached sturdy springs, and a couple of electric winches attached to the top. To store ...
4
votes
1answer
85 views

Excess solar power

I am wanting to hook up a solar system to my house but don't want to feed back into the grid (for a number of reasons, including legislative bureaucracy and having to change my electricity company). ...
2
votes
0answers
30 views

Which U.S. states have zero emission vehicle mandates?

Today the governor of Massachusetts announced that starting in 2035, gasoline-powered vehicles will no longer be sold in the state. From the announcement (emphasis added, and a "sic" ...
4
votes
0answers
48 views

Are there petroleum products which do not have practical alternative sources?

According to the U.S. Energy Information Agency, about 23 L (13%) out of every barrel of oil is turned into "other products": The other 150 L or so is turned into things which are burned ...
7
votes
1answer
75 views

Is less white paper usually more sustainable?

Copy paper can be purchased in different white tones. The shades of white are defined by the Commission Internationale de l’Eclairage (CIE) and take values from 55 (recycling-grey) to 171 (most white)....
5
votes
1answer
77 views

Saving energy in the dryer: short and hot, or long and low?

Where I live, cold winters and humid summers rule out line drying for bulky items like blankets and towels for a few months out of the year. When I put them in my electric clothes dryer, which ...
3
votes
1answer
43 views

Where can I find out about sustainable electronics?

Are there an online resources about brands or outlets? Are there certifications? Wikipedia refers to a 2014 Rank a Brand report about the sustainability of global electronics brands in general. I ...
4
votes
1answer
40 views

How effective are shrink plastic insulation kits for residential windows?

I live in an older home with windows that build up frost in the winter, which indicates they aren't insulated very well. I am thinking of installing kits like these over the windows: However, before ...
8
votes
0answers
34 views

Quantitative comparison of the economics and output of permaculture versus industrial farms

I am new to permaculture but would like to get a better feeling for if and how mid- to large-scale commercial permaculture farms could feed the world. In particular, I am interested in quantitative ...
11
votes
2answers
167 views

How exactly do the impacts of lithium mining compare to oil extraction over a vehicle's lifetime?

There's been a lot of discussion about the impacts of lithium mining vs oil extraction (here for example). I'd like to quantify this. How do the impacts of mining lithium for one electric vehicle (EV) ...
4
votes
1answer
91 views

Doesn't it make more sense to wrap hot sandwiches with the foil facing in?

You know those hot sandwiches sold in grocery stores (northeast USA at least...) that are wrapped in a foil paper? Wouldn't it thermally make more sense to have the shiny foil facing in? To keep the ...
4
votes
3answers
93 views

Efficiency of delivery services vs individuals travelling to purchase items?

Is it more efficient for a supermarket to send a van round to deliver stuff (eg a weekly/monthly shop for groceries) to multiple addresses, or for those people to drive (locally) to go and get it? ...
6
votes
2answers
91 views

Will planting trees around my house save me from pollution?

If one is living in a polluted city and plants trees around their house, Will it reduce air pollution? What about reducing heat in the summer?
5
votes
1answer
54 views

What is the relative carbon footprint of getting ones media from Netfix or bittorrent

It has been in the news recently that the carbon footprint of Netflix and other streaming services is significant.1.6 Kg of carbon dioxide per ½ hour viewing is on the high side of the estimates, 451,...
5
votes
2answers
64 views

How can I recycle when my apartment doesn't offer it?

I live in an apartment in an urban area. I would love to be able to recycle, but unfortunately, my building doesn't offer recycling as a service. I've searched for recycling facilities near me, and ...
4
votes
1answer
102 views

Throwing away compostable packaging

When I search about recycling compostable packaging I always find articles about recycling packages to the backyard pit etc. My question is not about that. I just want to throw compostable packaging ...
3
votes
1answer
68 views

Simple solar light system

I've been looking for a simple solar powered lighting system for a carport I just built. I bought these without realizing how small they are: 2 Pack Solar Lights Outdoor. Unfortunately they look ...
6
votes
2answers
73 views

Does oil spilled in backyard contaminate groundwater?

A poster near a recycling station mentions that one liter of cooking oil contaminates 1 million liters of water and suggesting cooking oil recycling. If I spill cooking oil in the dirt of the backyard,...
1
vote
1answer
45 views

What alternatives exist for bean bag filler?

One of my kids has asked for a bean bag for their room. I'm hesitant, mainly because of the styrofoam/plastic filler beans which (I assume) are generally terrible for the environment when they ...
2
votes
1answer
47 views

Efficiently freezing an ice pack once per 48 hours

Question: What are some good electricity-efficient ways to cool an ice pack down to ~5 degrees C once every 48 hours? Background: I am in a warm climate and connected to the grid in a US city. I don't ...
1
vote
1answer
37 views

Callibrate a battery monitor for a ~5yr old 360Ah solar panel installation

I am looking to calibrate a new battery monitor for an off-grid battery bank that's ~5 years old, since the previous battery monitor stopped working recently. I'm not sure how to go about it given the ...
2
votes
1answer
88 views

How to dispose ultra-processed food?

A friend of mine just recently started avoiding any ultra-processed food because of health concerns. However he already had some in his storage room and some have passed their expiration date.This ...
5
votes
2answers
177 views

Water electrolysis for storing energy

When wind and solar generate surplus energy, can it be used to break water into oxygen and hydrogen and to store the gases in liquid form for later use as an energy source? Was this ever tried in any ...
3
votes
2answers
48 views

What is the most efficient disposition of windows to prevent thermal loss and improve lighting?

Glazing is expensive and causes thermal loss. With those two considerations in mind, what configuration of windows is the most efficient in terms of reducing the area used by windows and maximizing a ...
1
vote
3answers
68 views

Why do most car manufacturers prefer electric batteries over hydrogen fuel cells?

Is this due to cost, or infrastructure, or path dependency, or incentives? I understand that batteries are more efficient (1) - but this does not take into account the quantity of rare materials ...
3
votes
1answer
34 views

Effects of refrigerating vegetables that I'm supposed to freeze

I recently experimented with storing "frozen edamame" in my refrigerator for 7 days (about 45 degrees F/7 deg C), instead of the freezer. There were seemingly no ill effects. So that made me ...
1
vote
0answers
38 views

Calculating U values - Am I doing it correctly?

I have recently moved into a property that needs refurbishment and insulation. It has late 60s - early 70s cavity walls. I wanted to work out what the current U value is across the property and what ...
1
vote
1answer
45 views

Gnat problem with a rotating composter

I use a Maze Compost Tumbler, which is a 2-sided rotary composter, to compost kitchen scraps. By volume, I add equal parts kitchen scraps, sawdust and peat moss whenever I add the scraps. It is ...
4
votes
4answers
92 views

Soil Restoration Issue - How to deal with thousands of small pine stumps?

Background: Just acquired a 4-acre lot in Southern Virginia. It was recently cleared of a ton of small (roughly 6-foot-tall) pine saplings that look like they were mechanically planted. I am not ...
2
votes
0answers
30 views

Trying to read display data on my new MPPT solar controller

I've got a new EPEver 30a MPPT solar controller and single 320 watt 40v solar panel connected 4 feet away with 12awg wire. Very simple van setup my battery is a single 12v deep cycle 115AH. Note: ...
7
votes
1answer
83 views

How do solar panels degrade after 25 years of warranty?

This question is focused on high quality solar panels (certified Tier 1) which are more and more mainstream. The 25 years warranty is becoming standard, and producers describe degradation in 25 years ...
1
vote
1answer
56 views

Are a significant portion of electric vehicle batteries reused as grid-connected batteries?

I've heard lots of people mention that concerns about the sustainability of electric vehicles are mitigated when you consider that at end-of-life the batteries can be reused as stationary, grid ...
5
votes
2answers
105 views

How can smaller businesses go carbon neutral?

Lots of big companies are making grand pledges to go carbon-neutral (or even carbon-zero, removing historical emissions). It is feasible for a smaller company (that is, businesses that’d never be ...
3
votes
1answer
74 views

Is Hygenic Earth Energy feasible?

This company: https://proton.energy/ Is trying to inject oxygen into old oil wells for it to combust and extract only hydrogen using steam reforming and a filter. Making steam reforming happen ...
6
votes
1answer
25 views

How to account for second life usage of lithium ion batteries in a life cycle analysis?

I am looking to conduct a life cycle analysis (LCA) to investigate the total greenhouse gas (GHG) emission contributions from lithium ion (Li-ion) batteries. The first part of their lifecycle is ...
4
votes
2answers
123 views

Is it safe to compost a pumpkin that has paint on it?

I have recently seen some pumpkins being curved for Halloween into jack-o'-lanterns and noticed it in some cases they are also being decorated with paint. I understand that pumpkins should normally be ...
1
vote
0answers
25 views

Life cycle inventory data or information concerning Ferrocyanide production

I am working in the modelling and environmental evaluation of redox flow batteries based on Anthraquinone and Ferrocyanide. Currently I am having difficulties in finding information on how ...
2
votes
1answer
68 views

What happens to all the shards of broken glass that get recycled?

I searched for recycling glass and there are no results. https://www.chestercountyswa.org/DocumentCenter/View/1646/New-Mixed-Paper-Guidelines?bidId= What happens with the broken glass in the recycling?...
2
votes
2answers
199 views

How can I recycle an enameled cast iron dutch oven?

I have an enameled cast iron dutch oven that has become unusable due to how cracked and chipped the enamel is. I need to get rid of it, and I'd hate to throw it away because there are several pounds ...
1
vote
0answers
20 views

Partial Passive Solar Jury-Rigs?

I live in an apartment, with the authority to make minor modifications, and I am wondering whether there are any fairly low-effort passive solar design elements that I can incorporate. Any ideas? ...
2
votes
0answers
26 views

Long-run marginal energy cost of my water use?

As a residential water consumer on US city water, I am used to thinking about the marginal environmental cost (particularly energy cost) of my additional water use, based on considerations like ...
1
vote
1answer
27 views

How does the cost of wastewater treatment scale?

Is it the case that some of the energy expenditure associated with wastewater treatment is more proportional to the amount/type of waste than to the amount of treated water (meaning that my water has ...
0
votes
1answer
34 views

Where in the US water system does most chilling occur?

A few studies I've seen investigating the energy intensity of water use in the US specifically enumerate the energy use of chilling*. Where in the system does most of that happen? How common/for what ...
2
votes
1answer
39 views

Is residential water pumping common?

Is it common for people on city water in the US to have their own on-site pumping as part of the "standard" delivery system, or is the pressure usually entirely supplied by the municipal ...
2
votes
1answer
57 views

Are there long-distance water pipelines emanating from the North American Great Lakes region? Why or why not?

Are there long-distance water pipelines emanating from the North American Great Lakes region? Why or why not? Under what circumstances would this be an ecologically reasonable way to provide water to ...
2
votes
0answers
44 views

Embodied energy of cold water

There is a significant chance that this has been covered on SE, but I haven't yet found anything similar enough for my taste (see related questions, below). Question: How could I go about coming up ...
1
vote
0answers
22 views

DIY Powdered Biodegradable Soap

I love Dr. Bronners unscented liquid soap! I can use it as dish washing liquid, body wash, laundry detergent, and shaving soap. And it's biodegradable so I can use it on the trail when backpacking! It ...

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