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10 views

What are online farming communities open to data gathering? [closed]

I'm an undergraduate and for a module I need to gather some data to influence the design of a weather app for a chosen audience. I've chosen farmers in developing countries. I've created a google form ...
1
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1answer
17 views

When does wind make more sense than solar for a home application?

Let's say I have a fixed amount of money that I can either spend on a complete solar PV system (panels, inverter, all the hardware and wiring) or a complete wind system (turbine, inverter, all the ...
2
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2answers
21 views

Is cheese wax compostable?

Is cheese wax compostable? I have some Babybel cheese wax and I was wondering what to do with it.
1
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1answer
36 views

Why not outlaw low density plastics that cause ocean pollution?

I know it costs. But we got rid of chlorofluorocarbons and are preparing to eliminate stuff like coal! This in between. Proposal: By international agreement get rid of floatable PE, HDPE and PP and ...
1
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1answer
21 views

Why is reducing the consumption of recyclables is better than recycling recyclables?

Why is reducing the consumption of recyclables is better than recycling recyclables? Some recyclables can be recycled only a limited number of times (plastics) so I partially understand it. But other ...
3
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0answers
32 views

Can mealworms form part of a healthy diet in the UK?

Mealworms for birds are a cheap form of nutrition. Could they be processed at home in a way to make them healthy? Dried mealworms are sold as bird food for just under £8/Kg in the UK or $3/Kg from ...
1
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1answer
26 views

Difference in Solar wattage between 24V and 48V system

[Cross-posted on Victron's community https://community.victronenergy.com/questions/85929/difference-in-solar-wattage-between-24v-and-48v-sy.html ] Background: I'm on a boat with a 48V system and a 24V ...
2
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1answer
44 views

Is there a total cost of ownership calculator for cars that will give me electric vehicle options?

I recently replaced a 20-year-old ICE vehicle in need of significant repairs with a five-year-old ICE vehicle. We had hoped that we could buy an EV this time around, but models that meet our needs are ...
1
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1answer
24 views

What hydrocarbons are produced by a diesel motor?

HC (I assum hydrocarbons) is a column in the euro emission standards for trucks & buses. Which hydrocarbons are produced and at what quantities? Would the particulate matter emissions be included ...
2
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1answer
29 views

Does a single Euro VI bus really release less NOx than a euro 6 diesel car?

A transport expert claimed that a Euro 6 car has fewer NOx emissions than a Euro VI bus, surely this cannot be correct?! https://en.wikipedia.org/wiki/European_emission_standards Euro 6b (diesel car) -...
4
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0answers
35 views

Which dishwasher program is best to conserve the plates?

I was arguing with my wife over which dishwasher program to use. I want to use the eco program because it is most environmentally friendly, but she countered that the long program (3:30h) puts more ...
1
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1answer
36 views

What type of solar panels to use for a house of 50 m2 and 3000 kW of consumption

I am beginning to acquire knowledge to assemble my first self-consumption solar kit and I have been investigating what kind of solar panels I should use for a house of approximately 50 m2 with a ...
2
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0answers
48 views

What is the fair-market value of the Solar System installed by Solar City in 2013?

I live in the Maryland suburbs of Washington DC. On December 31, 2012, I signed a lease deal with SolarCity (now Tesla) to install solar panels on the roof of my home + associated electrical ...
4
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1answer
58 views

How much electricity does 1,000 liters of water per meter of height fallen generate in various hydro generator arrangements?

How would one go about calculating the amount of electricity (kilowatt hour) produced from a quantity of, say, 1,000 liters of water per hour falling from a 20 meter fall through a hydro electric ...
2
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0answers
47 views

Should we use paper, plastic, or reusable bags. If reusable, which kind?

I found this site looking for one specifically geared to picking products based on sustainability. I'm not sure if such a specifically-focused site would actually be more effective than this one. The ...
0
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2answers
41 views

Carbon offset heating oil

My impression is that carbon offset plans are a rather imperfect and somewhat temporary solution - but still seem to be a step in the right direction, and at least signal consumer demand for green ...
2
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0answers
19 views

Worm bin design using stacked wood frames - is it okay to have gaps between frames?

I have used worm bins before that we premade with plastic. They were nested bins such that the bottom of an upper tray was directly touching the scraps piled up in a lower tray. Worked well! Now at a ...
5
votes
2answers
107 views

Do SSDs have a lower environmental impact compared to HDDs?

In this question on Super User they say that Solid-State Drives (SSDs) use much less power than traditional Hard Disk Drives (HDDs). I read some internet posts and research articles that backup this ...
3
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0answers
23 views

How does the afterheating function work for a solar hot water controller?

I have Resol DeltaSol BX controller for my solar hot water which I would like to configure best for my situation but the wording is a bit puzzling for me to understand. It was installed about 9 years ...
5
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0answers
22 views

Is thermal heating of soil contaminated by coal gasification plant safe in a built-up zone?

Where I stay, theres a site (see intro here) nearby that used to be a coal gasification plant (produces coal gas for lightning etc.). The plant contaminated the soil with PAHs and heavy metals with ...
0
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1answer
58 views

Grid tied inverters that work during power outages

Is it possible to have a grid tied solar installation operate when power is out without a battery bank? All of the grid tied inverters I have found kick offline during power outages. This is a fine ...
3
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0answers
73 views

What is the most cost effective way for an individual to contribute to global climate action? (For an Australian resident)

Edited: I would like to spend money in the most effective ways (local tax considerations included) I understand that in order to be effective at tackling climate change there needs to be action at a ...
5
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2answers
78 views

How to ensure you are using efficient chargers for cell phones, laptop computers, and other electronic devices?

I recently asked a question regarding a sustainable way to generate white noise. I received a wonderfully helpful comment from Móż (thank you!) in which Móż recommended ensuring that the power source ...
3
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1answer
54 views

How to create a sustainable white noise generation box?

I would like to create a white noise generation box. I want it to be as sustainable as possible (within reason), as it will likely be used 24/7. My thinking so far is to use an old, unused smartphone,...
1
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2answers
140 views

Why should I buy the brand solar panels when the cheaper ones offer a better power to price ratio?

Following this question, I'm trying to figure out what is the best option for me. Looking at brand products, for example SunPower Maxeon 3 400/410 Wp and SunPower P3 Black 325 Wp, they offer a power ...
0
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1answer
36 views

Effective strategies to use snow for refrigeration in the winter?

Before the invention and commercialization of refrigeration, many homes had an ice box, designed to store a large block of ice to keep perishables cold (from the National Museum of American History): ...
6
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3answers
116 views

Is human energy efficient?

I spent 2 weeks traveling on my bicycle, and usually I was very hungry.. Since I ate a lot of food, I asked to myself if maybe a train (dividing cost between all passenger) was more green than me! I ...
4
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1answer
61 views

Does plastic really degrade in a landfill?

There seems to be a lot of debate about whether, and how, plastic degrades in a landfill. There are many different types of plastic, from polypropylene to polystyrene. With this variety, it seems ...
5
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3answers
103 views

Which energy sources will replace fossil fuels for heating homes in cold climates?

Many countries are looking to phase out fossil fuels for domestic heat and hot water within this decade (see related question). Which alternative energy sources will primarily replace fossil fuels? ...
4
votes
3answers
56 views

Which CO2 price would make a real difference?

For context: Sweden is said to have the highest carbon price in the world at €110/ton (source). This price only applies to emissions not covered by the EU ETS (about half) which currently trades at an ...
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0answers
28 views

Asphalt (petroleum product) vs cement (carbon emitter) — how to choose?

This answer to another question points out that asphalt, a petroleum product, is used in large quantities. If we as a society want to reduce our dependence on fossil fuels, we will need to find an ...
2
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1answer
34 views

Can the production of herbal supplements (pills) be sustainable?

I have heard testimonies of people with various health conditions in which the ingestion of certain botanical supplements improved their health. Then I see the plastic bottle the supplements came in, ...
2
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0answers
21 views

What portion of the carbon credit market goes to reforestation/forest conservation projects?

In my understanding the supply side of the carbon credit market involves a wide range of different methods to sequester or otherwise prevent carbon from entering the atmosphere (renewable energy, fuel ...
2
votes
2answers
50 views

What makes swimming pool heat pumps unsuited for home use?

I noticed that heat pumps for swimming pools are a lot cheaper than equivalent heat pumps for home use. What could be the reasons for this? To give an idea, a 16kW monoblock heat pump based on R32 (...
2
votes
3answers
73 views

Which countries, regions, or cities have banned natural gas in new construction?

Last week, the city of Denver, U.S.A. announced a proposal to ban all new natural gas connections by 2030. From The Denverite: Changes to natural gas rules will come via revisions to Denver’s ...
-1
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1answer
32 views

How much of the car batteries are reused?

If you buy an EV then the batteries last for X years. What happens after that? Are they recycled 100%? Are the companies like Tesla collecting those batteries to recycle? If they are not recycled then ...
0
votes
1answer
41 views

Are optic fibre based daylighting solutions sufficient for solar panels?

Some daylighting solutions are available in the market that use collectors and large diameter optic fibre cables to transfer sunlight to interiors of residential or underground dwellings. Below are ...
4
votes
1answer
90 views

Any way for microinverter PV array to power a house when the grid is down?

Suppose I'm already heavily invested in microinverter type solar panels -- with the inverter on the panel on the roof. These comply with UL 1741 and will stop supplying power the moment they see grid ...
4
votes
2answers
46 views

Determining carbon reduction vs cost of various home upgrades

I've done some amount of upgrades to my house to reduce my overall carbon emissions, and reading online there are all kinds of suggestions for doing even more: Replace my natural gas water heater ...
2
votes
1answer
115 views

Can Hydroponic products be termed as organic food?

Hydroponics using NFT (Nutrient Film Technique) is heavily dependent on inorganic nutrients. However, modern marketing jargons term the food produced as organic and business model as sustainable. ...
2
votes
3answers
121 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
62 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
87 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
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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
2answers
122 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). ...
1
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0answers
36 views

Which countries, regions, or cities have zero emission vehicle mandates? [duplicate]

Today the governor of the U.S. state 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 "...
4
votes
1answer
81 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 ...
6
votes
1answer
83 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
2answers
117 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 ...
2
votes
1answer
45 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 ...

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