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75 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
494 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 ...
3
votes
0answers
105 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
1answer
53 views

Are red cedar posts a viable option for freshwater dock pilings?

We are installing a platform/dock on a small freshwater pond. The property has a great amount of red cedar available for our use. How long could we expect red cedar posts to last if used as pilings? ...
3
votes
0answers
120 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
217 views

biodegradable hair gel? [closed]

I'll be spending a month this summer on a mountain in an earth-friendly community. In their welcoming documents it says: [we] will provide bio-degradable soap, shampoo and lotion. When packing any ...
3
votes
0answers
66 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? ...
3
votes
2answers
139 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 ...
3
votes
1answer
73 views

Should a projector be turned off if it won't be used for five to ten minutes?

The conference rooms in my office have projectors mounted on the ceilings, typical of many offices. During the day, several meetings will be scheduled in the rooms, with perhaps five to ten minutes ...
3
votes
3answers
93 views

What would happen to greenhouse gas emissions if no more humans were born?

While discussing global warming and climate change, I have often seen people say that overpopulation is the real problem and that the biggest thing anyone can do is have one fewer child. Some people ...
2
votes
4answers
304 views

Why is it often more expensive to repair and maintain than to buy new?

What are the main factors and drivers that repairing and maintaining is often significantly more expensive than buying the good new?
2
votes
2answers
130 views

Is it possible to convert rain drops to energy?

Would it be possible to convert water drops into energy using a dynamo? A heating mechanism could then be used to transform the water back to a vapor to start the cycle again.
2
votes
2answers
205 views

What is the most sustainable packaging for milk?

When buying milk, there are three forms of available packaging: plastic containers, TetraPak, and glass bottles. None of these forms of packaging are optimal - plastic containers are single-use, ...
2
votes
3answers
83 views

What function does hanging a compost bin serve?

I just came across a school project to build a hanging compost bin: Lakeview Compost Bin. The benefits of composting have been a frequent topic here, but I'm wondering what purpose is served by ...
2
votes
3answers
193 views

For overnight heating, is it more efficient to use an electric space heater in a bedroom or a whole house natural gas furnace?

Is it more efficient to heat a bedroom with whole house's forced-air natural-gas burning furnace, or only an electric space heater in the bedroom? For a very location-specific application, electric ...
2
votes
3answers
84 views

Most cost effective heated flooring?

I am pulling out the carpet in my house. I live in a cold area. I want to heat my flooring, but don't want to spend an arm and a leg doing so. What is the most cost effective and energy efficient ...
2
votes
2answers
614 views

How feasible would a gas-powered electric-engine based car be?

Would an electric motorized vehicle work if there was a small gas-powered generator to power it instead of batteries? EDIT: The original Chevy Volt was going to have a gas generator to charge the ...
2
votes
4answers
479 views

What are the steps needed to fix Harbin's smog problem?

Harbin is a north-eastern Chinese city famous for its toxic smog. The smog has been caused by a combination of the weather, stubble being burnt in fields, coal being burnt for the municipal heating ...
2
votes
1answer
132 views

How much energy would it cost to stabilize 2 tons of water at 70 degrees?

I'm trying to figure out the efficiency of energy usage between heating up 2 tons of water from 5°C to 70°C everyday (during winter) within a certain given time (let's say one hour) and stabilizing 2 ...
2
votes
4answers
208 views

What isn't recyclable or compostable?

My community has single-bin recycling. Most consumer-level metal, plastic, and paper can go in there to be sorted at a recycling center. They don't take plastic grocery bags, cellophane, paper towels, ...
2
votes
3answers
195 views

How to heat an isolated room

I live in a medium-sized airy house whose bedrooms are all in the main part of the house, with the exception of one bedroom which is above the unheated garage. This room gets quite cold even in the ...
2
votes
4answers
108 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
3answers
117 views

PV system: Which to upgrade first: panels, inverter, batteries?

General question Adding on from the title, what are the restrictions to ensure that the various components of the PV system are compatible with each other? Are there rules around how many batteries, ...
2
votes
2answers
94 views

How to reduce indoor humidity in the summer time?

I own a home in southern Wisconsin, USA, where we have a humid continental climate (emphasis on humid!). There is no central air conditioning. This summer we are experimenting with cooling strategies ...
2
votes
1answer
192 views

Is IKEA a good furniture brand?

We all know IKEA is known for affordable, stylish, and easy-to-assemble home goods. I've furnished my apartment with several products but was recently questioning if I should continue to purchase to ...
2
votes
2answers
83 views

Is there a way to tell (or estimate) the electricity consumption of an arbitrary household item?

I often wonder how much energy a given item in my home is using. Examples include: the clock on my microwave my espresso maker an electric water kettle my phone charger (when no device is attached) ...
2
votes
1answer
90 views

Is there a formula for weighing ethical vs sustainable considerations when making a purchase decision?

Due to an accident our family needs to replace our car of 10 years. Normally we would make it last longer. The car needs to be big enough to transport the entire family. The only options meeting our ...
2
votes
1answer
367 views

Repair a bedside lamp

My beloved bedside lamp fell down, on the carpet so it wasn't a big hit, and it stopped working. Now, I tried to replace the bulb, but it doesn't change anything. Since this had happened to me ...
2
votes
2answers
291 views

algae lamp questions?

I have some questions about algae lamps: How does the algae charge the battery during the day?(process) How does the algae use energy from the battery at night?(process) Is algae able to fill the ...
2
votes
2answers
44 views

How to get a small volume of freezer capacity with high efficiency and low cost?

I have a big refrigerator/freezer and barely use any of the space. I also don't necessarily need to keep things cold all the time, as I mostly use it to freeze ice packs and extend the freshness of ...
2
votes
3answers
85 views

How can I conserve energy and water in my bathroom? [closed]

I am interested in energy conservation and would like some simple tips on ways I can reduce my water and energy use in the bathroom in particular, as I feel that this is the place that I use the most ...
2
votes
3answers
78 views

Will there be a role for combined heat and power in an all-electric future?

Beneficial electrification From the National Resources Defense Council “Beneficial electrification,” a new catchphrase in the energy world, refers to the growing recognition that using clean ...
2
votes
2answers
166 views

Is it better to leave your computer on?

This answer to a question on computer power use suggests that computers last longer when they are not frequently shut down. The answer is from 2014, and I do remember hearing this advice in the past. ...
2
votes
2answers
254 views

If water gets on solar panel connector from cleaning or rain will it cause problems?

I have a solar array with 8 panels. There is a slight gap between each panel. At 2 locations string MC4 connectors are placed between the gaps. My question is if water gets on this connector (and not ...
2
votes
1answer
76 views

Is cooking with palm oil healthy? [closed]

Cooking oil is very important to get a good taste. Is cooking with palm oil healthy?
2
votes
1answer
49 views

Does human activity result in a net increase or decrease in co2?

Human activities cause about 10% of total co2 emissions. However, humans cultivate about half of the earths land surface. These plants potentially cause photosynthesis and lower atmospheric co2. Do ...
2
votes
2answers
60 views

Dealing with waste in countries without waste management infrastructure

In previously sustainable countries, westernization brings unmanageable waste: We get flooded with plastic but don't even have garbage collection. Apparently the result is that 40% of the world's ...
2
votes
1answer
168 views

Are we running out of fuel?

It's just a matter of time, Peak-Oil will happen. There is no logical argument to assume it will not. We are doing efforts to replace petrol based products with something else, for fuel in combustion ...
2
votes
2answers
521 views

How to dispose of coated paper take-out container

I have a paper-based take-out container from a restaurant take-home meal: The inside is lined with some waterproof coating. I can't tell if it is wax or plastic. "Please recycle this container", it ...
2
votes
1answer
79 views

When are you a locavore? [closed]

I mentioned to someone that I admired the person because they were a locavore. They responded that they weren't a locavore because not all their foods were local, just like they weren't a vegetarian ...
2
votes
2answers
92 views

How to reduce energy usage of refrigerator while away?

I'm getting ready to take a trip for about a month. We'll eat all of the perishable stuff in our fridge/freezer, but this will leave lots of other things that will do just fine (frozen veggies, ...
2
votes
2answers
63 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 ...
2
votes
2answers
124 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 ...
2
votes
1answer
62 views

Lowest energy use per passenger-km, electric bicycle or electric unicycle?

Which uses less electrical energy per passenger-km (pkm) travelled? Electric bicycle (with a single rider) Electric unicycle (aka. self-balancing personal transporter) I have heard that a standard ...
2
votes
1answer
72 views

Which countries, regions, or cities have set a date to ban the sale of gasoline and diesel cars?

This week, the UK announced that sale of gasoline and diesel cars will be banned by 2035. This new policy moves the date up by five years, and also includes hybrid vehicles. From 2035 on, only ...
2
votes
1answer
55 views

Does decanting eliminate heavy metals in water?

If heavy metals are present in water would they precipitate to the bottom of a container if the water is left decanting long enough? This would be in order to reduce water contamination when no ...
2
votes
2answers
112 views

Why do some people say that biofuels are renewable energy source if producing biofuels requires nitrogen fertilizers?

Why do some people say that biofuels are renewable energy source if producing biofuels requires nitrogen fertilizers that are produced from natural gas (and energy output of biofuels is less than that ...
2
votes
1answer
104 views

What is the minimum indoor CO2 concentration that is achievable using houseplants?

CO2 concentration is linked to health risks and even our ability to think well. Meanwhile, houseplants decrease CO2 concentration when they receive enough sunlight. However, both houseplant studies ...
2
votes
1answer
36 views

What information is lost when converting other air pollution into CO2e?

I'm struggling to explain the most important aspects of air pollution in a concise way. I understand CO2 is the biggest issue and long-term driver of global warming, but beyond that I'm lost. News ...
2
votes
1answer
154 views

Using LEDs to generate electricity

I recently saw the Wired article You Can Power a Calculator With Some LEDs that said that LEDs can use electricity to produce light or they can turn light into electricity. If this is true, could the ...

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