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0answers
51 views

WTW versus LCA approach in carbon footprint calculations?

I recently did some carbon footprint calculations for the organization I work for. I used conversion factors I found at the Dutch CO2 emission factors website. This website lists standard emission ...
0
votes
0answers
53 views

What are the benefits or shortcomings of a moss wall?

I'm considering to put up a small moss wall in my workplace. What benefits or shortcomings should be considered regarding inhabitants' health and environment impact of a moss wall? Update: It's an ...
3
votes
3answers
153 views

Biomass plants. Why do we use them?

I've recently read they are classified as "clean energy", and some nations do not count the CO2 emissions it produces towards a national CO2 quota/limit. At this point I am a little confused. Won't ...
1
vote
2answers
61 views

How can I tell if my light is insect friendly?

This time of year, on my commute home through the forest, I need a bright headlight for me and other humans (and some wildlife) to stay safe. However, research suggests that night lights kill many ...
1
vote
0answers
36 views

How to sustainably survive in Besieged Hong Kong Polytechnic University? [closed]

Given the current situation in Hong Kong Polytechnic University, with 50 survivers (protesters) being besieged by more than 500 polices located at every intersection of streets nearby, and even drains/...
3
votes
1answer
85 views

Can data from wind and solar farms be used to improve climate modeling?

As of 2018, there were over 341,000 wind turbines around the world. In the U.S. alone, a projected one million homes will have roof-top solar PV by 2020. This does not include commercial or utility ...
4
votes
1answer
89 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 ...
4
votes
1answer
47 views

Should I turn vermicompost?

After adding plant matter to vermicompost, it kinda just sits there for a while, attracting fruit flies and growing mould. Would it be better to try to turn the compost so that the new matter is at ...
0
votes
2answers
62 views

In what unexpected ways could human hairs be recycled or upcycled? [duplicate]

Currently, hairdressers around the world throw away tonnes of human hairs after they have given someone a new hairstyle. I know people sometimes donate their hair, which can be used to create wigs. ...
1
vote
0answers
46 views

Must I install bypass diodes across my solar panels? [closed]

I have an array consisting of ten solar panels wired in series as shown in the figure below: My problem is that during some winter months (Oct - Dec maybe), in the afternoon, the sun is so low that ...
0
votes
1answer
72 views

Is there any case where plant farming is more eco friendly than raising livestock?

I am looking for an example or a case with arguments that would justify converting cattle ranches into plant farms (e.g., wheat, apple, or anything non-meat). The advantages should be in a more ...
0
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0answers
39 views

Examples of a city or region with poor economy and environmental pollution that turned to green economy and prospered

I am looking for some examples of cities or regions that initially suffered from poor economy, unemployment, pollution or any environmental problems, but they turned to green technology and ...
5
votes
4answers
76 views

How to design a taxi rank to charge electric vehicles whilst waiting for fares?

This post deals with the design of a taxi rank and how to reduce the pollution created by idling and edging foroward. A few answers suggested that making the taxis switch to hybrids, or even better ...
4
votes
5answers
64 views

How to prevent pollution caused by a taxi rank? Is there a solution to the 'edging forward' cost of cars in a queue?

I am looking at ways in which a heavily polluting taxi rank near a train station could reduce its pollution footprint. My first thought was that the pollution was mostly down to idling and I am ...
4
votes
2answers
823 views

Preventing idling - ideas to keep warm in a car when the engine is off and it is cold outside

I have asked a few people whose cars are idling if they mind switching them off to reduce pollution. One response I get from quite a lot of people is that they need to keep the car running to enable ...
3
votes
2answers
46 views

Relationship between Protein Content of Wheat and the use of Pesticides

Today I heard a news story on local radio about a farmers protest campaign in Hamburg (Germany). Currently in Germany the discussion about sustainability, climate change and environmental protection ...
6
votes
2answers
118 views

If everyone had an 'American carbon footprint', how much would the world's temperatures increase?

I'm trying to create a formula that would show: If every citizen in the world had an average carbon footprint of X.X kg per month, global temperatures could rise by X.X degC by 2050. I know there ...
4
votes
4answers
1k views

Are fuel cell electricity generators a sustainable way of making electricity?

Since 75% of the universe is hydrogen, would it be sustainable to use fuel cell electricity generators? Fossil fuel generators won't last forever, because there is not an endless supply of fossil ...
3
votes
1answer
74 views

Are solar powered cars sustainable and are they a good idea for future transportation?

As population rises, fossil fuels will start depleting so are solar powered cars a good idea? How much power can they produce when it is cloudy?
3
votes
1answer
240 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
24 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
37 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
48 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
89 views

Why do people buy carbon credits? [closed]

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 ...
2
votes
4answers
558 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?
4
votes
1answer
121 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
52 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
31 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 ...
4
votes
3answers
111 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
58 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 ...
4
votes
3answers
81 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/...
2
votes
2answers
88 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 ...
2
votes
1answer
92 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. ...
3
votes
4answers
113 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 ...
3
votes
1answer
69 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....
4
votes
2answers
278 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 ...
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 ...
0
votes
1answer
35 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
117 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)...
4
votes
2answers
94 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 ...
6
votes
3answers
141 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 :...
3
votes
3answers
91 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
45 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 ...
3
votes
3answers
78 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 ...
9
votes
5answers
195 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 ...
4
votes
2answers
97 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 ...
3
votes
1answer
164 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
93 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. ...
4
votes
2answers
92 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 ...

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