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votes
2answers
99 views

Alternative to bananas in Europe

If you buy bananas in Europe, they usually come with a high CO2 level, since they are mostly produced overseas. Is there a fruit produced in Europe which comes quite close to bananas in terms of ...
6
votes
4answers
173 views

Is boxed wine more ecofriendly than bottled wine?

In a few weeks I'll be hosting an event and will need to purchase wine for about 30 or 40 people. For myself and my partner, I typically purchase boxed wine as it stays fresh longer (assuming the wine ...
5
votes
2answers
2k views

What are examples of perennial crops?

I just read this fascinating article on kernza, an alternative to wheat that is a perennial, rather than annual, crop. From the article, "Can This Breakfast Cereal Help Save The Planet?", this is ...
2
votes
1answer
28 views

When/where is it feasible to use a solar cooker to boil water?

Can a parabolic reflector-type solar cooker of reliably boil water? If so, what major factors determine how much/how intense sunlight is required to do this how much water can be boiled how long the ...
3
votes
5answers
150 views

How does one utilize the low pressure of a rain barrel?

We've been considering getting a rain barrel, and I like the idea -- it doesn't make sense to just have the water run off into my yard creating a rut; I'd rather put it to good use. Problem is, my ...
2
votes
1answer
95 views

CO2 track of staying in huts which are supplied by helicopter

How much CO2 do we produce by sleeping on average in a hut (including breakfast and dinner)in high-altitude > 3000 m)? Let's assume that the hut offers 50 beds and that a helicopter has to supply the ...
4
votes
1answer
76 views

Which materials dumped into landfills are the largest sources of methane?

Recent research has shown that landfills (garbage dumps) can be major emitters of methane. The largest methane emitters in California are a subset of landfills, which exhibit persistent anomalous ...
6
votes
1answer
192 views

Is working from home a more sustainable choice?

Due to the recent COVID-19 outbreak and subsequent lockdowns in multiple countries, there have been reports of marked decreases in day-to-day pollution hanging over cities, such as this report on ...
5
votes
1answer
57 views

Biomass: Digestor/Reactor vs Gasifier Efficiency

When using biomass for energy, two popular options are reactors and gasifiers. The first uses anaerobic micro organisms to convert the biomass to fertilizer and a methane rich gas mixture. The second ...
4
votes
4answers
5k views

How do I recycle Kidde brand smoke detectors?

I live in the United States and I have a non-working Kidde ionization smoke detector. I've read that these smoke detectors should be recycled because they contain some radioactive material. However, ...
5
votes
1answer
84 views

Throwing organic waste on the ground

Here is a situation I often find myself in. I’m in a park (trees, grass, etc), I’m feeding a fruit to my kid. At the end when I’m left with the peel (or seed or whatever is the waste), I look at the ...
2
votes
1answer
57 views

Should I purchase soft-plastic refill packs or new tins for chocolate powder?

A few brands of chocolate milk mix come in re-sealable tins like this: It is also possible (and slightly cheaper) to buy 'refill packs', in order to reuse the tin. However, these refill packs are ...
0
votes
0answers
19 views

Where can I buy samsung SDI ESS rackmount home batteries in the United States?

I am not interested in a Tesla powerwall for a variety of reasons - some of them having to do with non-standard form factor and some of them having to do with phoning-home and general network privacy ...
5
votes
1answer
142 views

What is the carbon footprint of pet food?

Are there any detailed studies of the carbon footprint of pet food production? There are plenty of articles asserting that meat in cat and dog food is a major source of carbon emissions (e.g. from ...
3
votes
3answers
467 views

Method of transport with decent speed/low cost without a driving license?

I'm looking for something a little bit better than your average bike in terms of transportation potential, but cannot be a license-required vehicle as I cannot get a driver's license. I also don't ...
21
votes
4answers
146k views

Leaving the oven door open for heat - bad idea?

I've heard before that it's a bad idea to use an oven to heat your house, because it's inefficient and carries the risk of carbon monoxide poisoning. But what about leaving the oven door open after I'...
5
votes
6answers
221 views

What can an individual do to meaningfully practice carbon capture?

There is a lot of information on the Internet about how an individual can lower or negate their carbon usage through various techniques and strategies but much less information on what a person can do ...
3
votes
1answer
73 views

Which global fertility rate would allow the human population to adjust to Earth's carrying capacity while maintaining an acceptable dependency ratio?

Humans currently consume the ecological resources of 1.75 Earths (https://www.footprintnetwork.org/). Assuming that global average consumption remains stable (less in the global North and more in the ...
5
votes
2answers
202 views

Organic & natural (maybe edible) alternatives for Pre Shaving cream, foam, oil etc?

From some old school yoga & ayurveda folks I've heard of the following for shaving: Raw Milk - I haven't tried this as yet but hope to do so when I get some unheated/ unpasteurized milk. It can ...
2
votes
1answer
47 views

How do I clean my avocado oil intermediate bulk container so I can store water in it?

I have two 275 gallon (1040 liter) IBC totes that used to hold avacado oil in one, and canola oil in the other. I want to use it for emergency drinking water. What is the best way to clean it and ...
0
votes
0answers
42 views

Is Privet Hedge a “Living Desert”?

A friend of mine who is working for a big gardening center helped me lately to cut my green waste for the compost and realized the branches were Privet. He claimed a Privet-Hedge would be a "living ...
7
votes
2answers
91 views

How to get the most out of computer hardware before it becomes obsolete?

Let's say, i use my personal computer for office tasks only and am happy with its performance as long as the operating system and the browser receive regular security updates. What would be a ...
5
votes
3answers
84 views

Alternative to sealing compound

Has anyone ever used self-made, eco-friendly sealing compound for outdoors? What recipe? How long does the recipe you used last? I intend to use this sealing compound to stop wasps from getting in ...
21
votes
4answers
4k views

Do USB outlets waste energy just like conventional wall warts?

It is widely known that most AC-DC converters (aka "wall warts") continually use electricity, even when no devices are plugged in to them. That wasted energy is often called "phantom electricity" or "...
2
votes
1answer
60 views

Can I use 2.5kW solar panels to power 2kW rated grid tie solar inverter?

Can I use 2.5kW solar panels (10x 250 watts) to power 2kW rated grid tie solar inverter? Will anything blow up? Panels: 10x 250W, 36V panels Inverter: 2kW with max input voltage: 500V any help is ...
7
votes
2answers
14k views

How much power does an idle PC use?

My university's IT department has recently sent everybody an email asking us to leave our computers on at night, every night, so that they can do remote maintenance. They say "Despite what you may ...
3
votes
2answers
106 views

Are there companies that have a system for capturing methane from a city's sewer system?

Each city must have a sanitary sewer system and there are thousands of households in a city. So we will have a lot of methane generated from these sanitary sewer systems which can be utilised. So is ...
17
votes
2answers
246 views

Are Tetra Pak tomatoes more sustainable than tinned?

Lots of UK supermarkets have recently started selling chopped tomatoes in Tetra Paks, rather than the tins they were always in. My first thought was that this was environmentally bad - given recycling ...
4
votes
1answer
102 views

How can I figure out what's using so much electricity in my home?

I recently moved into a new home with 2 other housemates (joining 1 who already lived there) and our combined bill for electricity is far higher than I expected. Now we're using just over 40 kWh per ...
3
votes
1answer
95 views

What to do if small amount is left in the toilet after flush?

Apologies in advanced for disgusting question. I share a bathroom with someone. He has started to get really mad that after I flush the toilet...not all the waste gets removed (95% of it does but some ...
3
votes
1answer
53 views

Any electric vehicle that can be used as a home energy storage?

I have a house with a solar array on top currently tied to the grid. I would love to be able to use an EV as a battery for my house, and after it charges up in the day be nice to use it for the ...
2
votes
1answer
45 views

How to reduce the environmental impact of drinks containers

I would like to help the owners of a pub (based in Milan, Italy) to decrease the environmental impact of the waste they produce. My intent is to make them buy the same food content (especially drinks)...
3
votes
3answers
107 views

Direct Electrical Heating

For a college project, I'm looking to learn about direct electrical and biomass heating as a means of decarbonization of our college campus? Where can I learn about these? Searching for direct ...
12
votes
2answers
3k views

How is compostable plastic recycled/composted industrially?

I know that you need industrial facilities to compost compostable plastics within a reasonable timeframe. But how does this process work exactly? How long does it take? Is it simply a matter of doing ...
2
votes
2answers
57 views

Will negative power pricing counteract the growth in solar PV capacity?

In California, the real-time electricity prices routinely go negative. Here's pricing for the four load aggregation points for California on April 1, 2020 (source): This is due to the large amount of ...
1
vote
3answers
66 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 ...
2
votes
2answers
93 views

Are there any active vehicle to grid programs around the world that are accepting customers?

It seems like people have been hyping the benefits of vehicle-to-grid (V2G) for decades. The basic premise of V2G is that electric vehicles, when plugged in to the grid to charge, can offer services ...
53
votes
15answers
18k views

Alternative to Toilet Paper?

Are there any sustainable alternatives for toilet paper? This could either be done by recycled paper (if such exists), but perhaps some other creative solution could be interesting.
0
votes
1answer
36 views

Creating a string of six 2V batteries in series to power an inverter

Background: I have a Magnum Energy MSH3012RV 3kw inverter-charger that runs on 12VDC and I'd like to be able to discharge around 250 to 300 AH between recharges (from 120VAC input) without the ...
1
vote
1answer
39 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 ...
6
votes
1answer
287 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 ...
6
votes
1answer
123 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 ...
6
votes
3answers
2k views

What is this candy wrapper made of? Solely plastic or mixed with something else?

I am an avid recycler - whenever I get the chance to recycle, I do it. The only problem is, I can't mix materials when recycling. I want to recycle the following: It's wrapping for candy - in this ...
2
votes
0answers
21 views

How much renewable energy is curtailed around the world?

CAISO, the California electric grid operator, provides daily and historical reports on wind and solar curtailment: I started looking for similar data from MISO, the grid operator where I live, ...
2
votes
1answer
46 views

Did any country, city, or village implement a coffee separate collection with success?

Coffee is a wide produced and consumed drinking all around the world. After the use, exhausted coffee filters (wet coffee powder) are a very nutrient fertilizer. This brought some people to collect ...
4
votes
1answer
262 views

How bad are incense sticks for environment?

Belonging to a country where incense sticks are used extensively, I wonder how bad are they, althought it is said they are good for air. But at moment, it seems highly misleading to me. What are the ...
2
votes
2answers
42 views

What is the most efficient setting on my oil-filled radiator?

I have an oil-filled radiator with three heat intensities: Low (900W) Medium (1100W) High (2000W) Given the radiator has a thermostat, what is the most efficient heat setting to use? My goal is to ...
3
votes
0answers
28 views

How much additional CO2 emissions will result from recent changes to US vehicle regulations?

From the Guardian, March 31, 2020: Trump to roll back Obama-era clean car rules in huge blow to climate fight (emphasis added): The Trump administration is rolling back the US government’s ...
9
votes
5answers
6k views

Dishwasher or paper plates: which are worse?

After running the dishwasher last night it struck he how much energy it must consume: from heating large amounts of water to the motorized pumps and spinners to the heated plate drying. Then there's ...
2
votes
2answers
107 views

How much more efficient is boiling water with a lid?

I sometimes end up boiling water in a pot without putting a lid on top because I can't find the lid. How much energy is wasted when bringing water to a boil without in a pot without a lid? Or ...

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