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2
votes
1answer
16 views

Are single-use PurPod coffee pods from Ethical Bean made with PLA?

I'm purchasing "compostable" K-cup coffee pods from Ethical Bean (see attached photo) that work in Keurig single-serve coffee machines. According to their FAQ, these compostable pods are OK for the ...
0
votes
0answers
13 views

How sustainable is replacing a gas car with an electric car, since gas car still exists? [duplicate]

I drive a 2010 BMW 535i maybe 100 km/week, mostly urban driving. My wife also has a gasoline car which we can use for longer trips. I want to reduce our greenhouse gas emissions by buying an electric ...
1
vote
2answers
19 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 ...
2
votes
1answer
35 views

How more efficient are low surface temperature radiators than traditional boiler systems?

I've recently come across low surface temperature radiators (E2 technology) as a form of heating. Unlike a traditional water radiator they operate at 30 - 50 C instead of 75 C. Small fans pull air ...
1
vote
2answers
21 views

Why do people buy carbon credits?

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 ...
0
votes
4answers
49 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?
3
votes
0answers
18 views

Air source heat pumps: does prevailing wind matter?

Part of an air source heat pump is a fan to circulate air over the refrigerant circuit. Is it less efficient (and by how much) to point this fan into the prevailing wind? Or does it not matter (i.e. ...
4
votes
1answer
45 views

Is this discrepancy between energy label and measured values reasonable?

My fridge is a Haier A3FE835CGJE and is rated A+++ (Europe, 2017), with about 200 litres volume, half of which for the freezer. It is a "no frost" model which does not require defrosting. The ...
1
vote
1answer
26 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 ...
2
votes
2answers
34 views

How do I revive an old compost pile?

I just moved into a new home that has a backyard composter (about 80 gallons). The composter has been sitting unused for an unknown amount of time (at least 3 months). How can I assess the health and ...
3
votes
1answer
36 views

What's the carbon footprint of watching IPTV?

There are some topics discussing the carbon footprint of an email: What’s the carbon footprint of an email? https://twosidesna.org/US/The-Carbon-Footprint-of-Email-is-quite-large/ However, I found ...
3
votes
3answers
54 views

Should leaf composting be separate from food waste?

The city where I live is running a campaign to keep leaves out of the streets, where they contribute to phosphorous in storm water run-off causing lake pollution. I'd like to avoid the need to send/...
1
vote
2answers
48 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 ...
0
votes
0answers
47 views

Effects of global 'wilding' of weather? [closed]

Is the increasingly wild weather causing more turbulence in the upper atmosphere, which could result in larger amounts of it being thrown up into space and lost? I don't know, for instance how long ...
2
votes
1answer
34 views

How to work around a supposed Huawei SUN2000L-5KTL inverter throttling issue

I have a PV system with a WEG SIW300H M050 inverter, which is simply a rebadged Huawei SUN2000L-5KTL (link to the manual). Its rated output power is 5000 W while its nominal apparent power is 5500 VA. ...
2
votes
1answer
44 views

How can I recycle safety razor blades?

I recently switched to a safety razor because It's cheaper in the long run, even if I change blades more often disposables are a recycling nightmare - (metal bonded to plastic) Of course eventually ...
2
votes
1answer
39 views

Which of disposal or production of leather has a greater environmental impact?

Several times I've heard of people supporting leather against non-animal alternatives, saying that since animals are killed for meat we have a lot of skin to use and that it would be bad not to use it....
3
votes
2answers
45 views

Optimal aspect to position air source heat pump (south/east/west)?

There is much conflicting information on this, e.g. Nu-heat: Bear in mind that your heat pump will need to work harder if it is situated in a cooler, north-facing, shady position, than if it is ...
-1
votes
1answer
52 views

Does the cost of wind energy double when calculated correctly? [closed]

https://www.google.com/amp/s/www.instituteforenergyresearch.org/renewable/wind/the-hidden-costs-of-wind-power/amp/ I am asking if any of this makes sense. If their estimates are valid.
3
votes
3answers
72 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 ...
-1
votes
0answers
14 views

heat pump temperature drop from pump output to DHW temperature

Say a heat pump outputs water (for DHW) at 55 degrees, and there is a 10m run to the tank through 22mm pipes. What temperature would you reasonably expect water to exit the taps?
0
votes
1answer
32 views

heat pump ecodan noise: constant or variable

I have just seen an Ecodan PUHZ-W85VAA in action at the house of the salesman. It running very quietly, but I wanted to know will it get louder as the weather gets colder? In other words does the pump ...
3
votes
3answers
97 views

Why are new cars being built in the UK / europe without Start-Stop technology when it seems it can lower pollution?

Everything I have read online seems to indicate that start / stop technology reduces air pollution, is (marginally) better for the engine, reduces emissions and is more economical (link1, link2, link3)...
2
votes
2answers
67 views

Emissions offsets versus avoidance: can they be compared?

I'm going to be traveling from London to Toulouse next year. I could take a flight for around £100, or a train journey for £170. The emissions for the flight would be about 500kg, which would cost ...
3
votes
0answers
32 views

Plane and train greenhouse emissions - comparison taking infrastructure in account or not?

In the news or various other places, we see often that train travel produces significantly less greenhouse gas than air travel, without much information about how this is calculated. For example here :...
2
votes
3answers
77 views

Does Start / Stop technology in cars have an impact on air quality and by how much?

I have repeatedly heard from various car enthusiasts that start stop technology has no benefit in improving air quality (or the tiniest smallest negligble benefit). Does it have an effect and how much?...
0
votes
1answer
36 views

What are some leguminous food trees suited for a Mediterranean climate?

I can think of carob, which already grows in the area. What other kinds would be a good source of nutrition and thrive in a Mediterranean climate with little annual rainfall? Other tree suggestions ...
-1
votes
1answer
27 views

Have wind installations peaked? [duplicate]

It looks like a hubbert curve. Has the wind industry peaked for new installation.
3
votes
3answers
60 views

Sustainably waterproofing a rain jacket

My raincoat was fully waterproof when bought some 8 years ago. Now it's like a cotton blouse in that it soaks up water immediately. I have washed it with technical wash and sprayed it with ...
6
votes
4answers
99 views

How much land would be covered by the plants that turned into the fossil fuels humanity has burned?

Many climate deniers suggest that humanity is too insignificant to impact the global climate. As a visualization to counter this claim, I thought of the following exercise. How much coal, oil, and ...
3
votes
2answers
70 views

Which are the 66 (65?) countries that vowed carbon neutrality by 2050 at the September 2019 UN Climate summit?

I couldn't find the list anywhere. See: Straits Times -- 66 countries vow carbon neutrality by 2050: UN Sixty-six countries have signalled their intent to achieve net zero carbon dioxide emissions ...
1
vote
1answer
54 views

Approximate CO2 emissions for shipping a parcel from one location to another

First of all, I know it is impossible to answer this question accurately. But that is not the point. An approximation will suffice. For a project I need to display the CO2 "cost" for shipping a ...
5
votes
5answers
2k views

What is the climate impact of planting one tree?

I was reading the news today, and noticed that in the UN Climate Summit, it was decided that over 11 billion trees will be planted to sequester carbon dioxide from the atmosphere. I was thinking that ...
2
votes
1answer
39 views

Why don't mineral water cans carry a deposit label?

I've been putting in the recycling bin all our "sparkling water," "mineral water," and unflavored Canada Dry cans. But then I wondered if I could return them to the grocery store for deposits. ...
3
votes
2answers
72 views

What are the most sustainable options for filtering tap water for drinking?

I live in Europe (Belgium), where tap water is generally safe for drinking, but may vary in hardness and taste. It's pretty hard and not so good in my area, so I've been using (Brita) water jugs for a ...
0
votes
0answers
16 views

Plastic coated cardboard [duplicate]

Some cardboard boxes are apparently coated with a thin layer of plastic, example that I'm looking at is a box that contained a case of Yuengling beer. Okay to recycle?
1
vote
2answers
82 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 ...
6
votes
1answer
1k views

Are there any adverse impacts if I keep WiFi router on all time?

I searched Google only to come up with various results with different views. Is there any official or reliable source that states the impacts of keeping the WiFi router on regarding environmental ...
2
votes
1answer
103 views

Pros and cons of solar panels over a parking lot?

What are the net benefits to clearing a plot of trees, or grass to install solar panels? Isn’t it better to install the panels over parking lots?
2
votes
2answers
136 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
1answer
35 views

Do light fixtures with small solar panels require direct sunlight?

I purchased an Osram Ledvance DoorLED Solar product which charges its own batteries and turns on automatically at nighttime to provide light. It requires a 7 hour minimum charge time. When there is ...
3
votes
0answers
42 views

Is Tawashi really suitable for dishwashing?

As a step to reduce my waste I planned to make a tawashi to replace artificial dishwashing sponges. I had a t-shirt not suitable to be donated, waiting to be upcycled, so I made t-shirt yarn out of it ...
3
votes
1answer
54 views

Distinguishing between polyethylene and polypropylene plastic food packaging for recycling

I want to recycle as much food packaging plastic films as possible (I'm willing to clean and dry them). As far as I know, food packaging films are only made from 3 types of plastic: polyethylene (PE), ...
4
votes
2answers
102 views

How to sell orange squash without plastic bottles?

Does anyone know how they used to sell orange squash before plastic bottles were invented? (Or perhaps no-one did?) And if there was a ban on disposable plastic, how would orange squash be sold? In ...
0
votes
1answer
48 views

Is the cost of non-fossil fuel LCOE misleading?

Natural gas is a waste product. Its "cost" is almost entirely profit. All renewables can do is compete down this margin, they can never beat gas. If renewables are cheaper that just means some ...
1
vote
0answers
15 views

Is there a Life Cycle Analysis comparing natural gas and propane as heating fuels

I am choosing between natural gas and propane for a boiler. I see a discussion here where the accepted response primarily deals with the CO2 released during actual burning of the gas. I am curious ...
6
votes
2answers
144 views

How does the climate impact of an LNG-powered cruise ship compare to flying?

Taking the Iona as an example, it is claimed that "The cruise ship will have a reduced carbon footprint with zero sulphur and nitrogen emissions." Sulphur and nitrogen, while pollutants, are not ...
1
vote
0answers
21 views

Solar Install Flat Roof

I want to install 23 305w panels on my roof. It's a flat roof constructed with 2x8 beams spaced at 24". There is no snow load to consider and we get occasional wind and rain storms a few times per ...
3
votes
2answers
76 views

Which printer font can I use to reduce ink consumption without impacting readability?

Apparently Arial isn't a very efficient font, when it comes to ink consumption. This article claims Times New Roman is 27% more efficient. Another article claims Garamond was the most efficient font ...
1
vote
2answers
70 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, ...

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