All Questions

Filter by
Sorted by
Tagged with
1
vote
0answers
20 views

Non-plastic straws in Germany?

I want to find non-plastic straws. Are there are any in Germany, that you can physically buy? I live in Bavaria. I have a big Edeka, Rewe, Lidl and Rossmann nearby, but I am ready to travel "great" ...
2
votes
1answer
30 views

What is the most sustainable option for writing in the classroom?

I teach in a kindergarten classroom. I would like to know what is the most sustainable out of: paper (starting new, and then as the year goes on, reclaimed/reused as possible paper inside of either ...
3
votes
0answers
29 views

Can metal drink cans be melted at home? [duplicate]

Can metal drink cans be melted at home and reused, remoulded into something?
1
vote
2answers
53 views

Excavating holes for cooling during summer nights

This idea is motivated by the readings of this Hungarian weather station: It sits within a ponor/doline which is basically a hole in the ground that allows the collection of the dense cold air. It ...
0
votes
1answer
43 views

Where can I get a methanol generator?

I’m looking for a source for a methanol generator. Google is not helping. If nobody makes them, maybe a good solid methanol motor could be attached to a generator. Please help me if you have ...
0
votes
2answers
31 views

Reducing/Offsetting Impact of New-Build Home [on hold]

So, here's a breakdown of the question. Situation: In the next month or two I will be moving house to a new-build detached house in the UK, which is on an estate of around 100 similar such properties....
1
vote
1answer
51 views

How could I use egg yolk from boiled eggs?

Both my wife and I avoid eating yolk (as much as possible). I know I can find some uses for raw yolk but I am not sure if the yolk from boiled eggs can be put to good use, other than forms that ...
1
vote
0answers
17 views

Is there demand for a Stack Exchange site for the Climate Crisis? [migrated]

I belong to a group of Fulbright Scholars that has been entertaining the idea of an online massively collaborative approach to the climate change crisis. Particularly, imagine a stack exchange site ...
4
votes
2answers
84 views

How many square kilometres of offshore wind farms would be required to replace the closing of a 4GW nuclear power station

A large nuclear power plant has a capacity of 4GW and a capacity factor of about 90%. How much installed capacity of wind turbines with a capacity factor of 40% would be required to match that output?...
-1
votes
1answer
55 views

Corn after humans

None of my farmer friends who grow corn for a living seem to have an answer for this. After an event that wipes out all/most human life, how long would fields planted with food corn be expected to ...
3
votes
4answers
86 views

Is there standard methodology for assessing how environmentally friendly a particular lifestyle is?

The headline says it all, I'm looking for a standard way of assessing a lifestyle against environmental criteria. I'm thinking of some sort of lifestyle questionnaire that will produce a score from 0 ...
-1
votes
3answers
123 views

Is wind power practically dead?

U.S. annual installations have been declining since 2012. Essentially everywhere else, besides China's low quality wind, there's only a handful of new farms being built. Is wind pretty much dead?
2
votes
2answers
99 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 ...
1
vote
1answer
34 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 ...
4
votes
1answer
155 views

What is the energy payback time of portable solar panels, in hours?

I'm interested in knowing the typical energy pay-back time of a solar photovoltaic panel, in terms of hours operating under an ideal scenario. Energy pay-back time (EPBT) is usually quoted in terms ...
1
vote
1answer
27 views

What is the typical embodied energy of a solar photovoltaic panel?

What is the typical embodied energy of a solar photovoltaic panel, in terms of nominal power output or panel area? The ideal answer would be in kWh/WP, but kWh/m2 would also be acceptable. I ...
2
votes
1answer
79 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 ...
3
votes
1answer
47 views

With current technology, how much CO2 is emitted when making renewable power plants?

In order to make a solar panel or a wind turbine, a few basic inputs are required: labor energy water raw materials Given the current abundance of renewable resources, I assume that the first three ...
1
vote
1answer
75 views

Recycling : paper, plastic or aluminum, which one to choose, if only one?

Supposing I can focus only on one type of material to recycle, choosing from paper (card board etc), aluminum (can etc) or plastic (water bottle etc), then which choice of material will help the ...
0
votes
0answers
34 views

Palm oil usage statistics

Can someone point me to a resource that would detail what is palm oil being used for, preferably with some % indicators? A staunch meat eater has been boldly proclaiming that being vegetarian or ...
2
votes
0answers
31 views

How to make extracts and fragrances from fragrant plants like Sage

I'm looking to try using more natural products/solutions in our day to day life and some things that I am considering are fragrances, soaps and essences (food). I have read that Sage plants are edible ...
2
votes
1answer
32 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
0answers
35 views

Objective Index of environmental impact of consumer goods and food [closed]

I often hear arguments from people around me, about the environmental impact of certain consumer behaviours like: eating meat using plastic bags travelling via car instead of plane and many others. ...
4
votes
1answer
64 views

Plastic incineration vs discarding considerations

Firstly, let me say, I am not pro-either. I just hear about people trying to save the environment (and putting an end to bad municipal 'dump site' behaviour) by rather burning their trash. This is ...
3
votes
2answers
37 views

Should the CO2 footprint of employment factor into purchasing decisions of consumer goods?

If my employer pays me £80 per day, and I can estimate the CO2 footprint of doing my job, compared not working, is around 15Kg CO2e. So my earnings have a footprint equivalent to 180g CO2e per £. (...
0
votes
3answers
54 views

Any succesful initiatives for packaging material reuse?

I find that we are having more and more things delivered as opposed to buying in stores. This winter a few cardboard boxes with 10kg of oranges, several books, and just this week a fridge. I was ...
0
votes
0answers
35 views

How to sell shredded plastic in the UK?

I would like to purchase a shredding machine in order to shred plastic myself, I was wondering if there were any standards I'd need to watch out for and where I could find businesses willing to ...
1
vote
0answers
27 views

Uses for Sycamore tree bark?

I live near a number of parks which have very large Sycamore trees. In winter these trees naturally shed their bark. The bark tends to pile up at the bottom of the tree until, I assume, the park ...
2
votes
1answer
60 views

Are there examples of (more) sustainable scientific conferences?

Scientists frequently speak out about the dangers of climate change, and I'm sure there are many scientists who make concious choices for their own lives with a view towards sustainability. But are ...
6
votes
3answers
188 views

Laptops vs desktops

I've often wondered whether it's more environmentally friendly to use a desktop or a laptop. To compare purely the electricity usage, I can of course calculate how long I leave my computer turned on, ...
3
votes
1answer
52 views

Will I damage batteries by charging them directly with solar outputs?

I recently picked up a few cheap, mini photovoltaics. I'm planning to wire three in parallel for a 2V, 900mA max output. I'm not well versed in battery mechanisms, and I was wondering if I would ...
4
votes
1answer
60 views

How to encourage people to sort waste properly

We have put a fair amount of effort into reducing the impact of our staff canteen in our office. One part of this is introducing separate food waste and recyclables bins. However many canteen users ...
2
votes
1answer
49 views

To what extent do CO2 emissions from motor vehicles vary?

Do the CO2 emissions from petrol / gas vehicles vary depending on driving style? Are emissions a function of the engine type or the fuel efficiency? If a motor car is rated at 105 g/km, but it is ...
2
votes
2answers
86 views

Does a short-term shut down of a coal plant cause more CO2 emissions than keeping it running?

According to this article from Reuters, it takes up to eight hours for a coal plant to reach maximum generation. This means that four up to eight hours after it starts up, the plant is burning coal at ...
0
votes
1answer
33 views

I have got some lights for hydroponic growing, they run from the UK mains but have small clover shaped connectors - what are these called?

I just got a load of LED grow light tubes - they have mains connectors that use clover shaped plugs -- very much like a lot of laptop chargers use, but just a bit smaller. There is no label on the ...
0
votes
0answers
18 views

Can goats eat Australian pine ( Casuarina Equisetifolia )?

I have a lot oF Australian pine growing in my backyard and was wondering if it’s okay for goats to browse on the needles and pine cones?
3
votes
1answer
45 views

With two 50W panels best to wire in series or parallel?

Charge controller (Renogy Wanderer 10A PWM) can handle the combined voltage when wired in series. From the spec sheet, it has a max PV input voltage of 50VDC. Panels connect to a charge controller ...
3
votes
1answer
35 views

How to mark pavement and grass without harming environment

I'm looking for some kind of paint to make markings on the pavement and on a grassy area, so that the markings are well visible for a day or so. Spray paint would do the trick but is not very ...
2
votes
2answers
64 views

Electric cars and grid power capacity

The UK has a target to be carbon-neutral by 2050: As we can see in the image large cuts across all type of CO2 emissions are required. This article by the BBC suggests a number of ways in which ...
3
votes
1answer
31 views

Is there a difference between DC \ PV cable and AC cable?

I have now seen a few DIY tutorial videos (not in english) which suggest that one should use DC cable for connecting Solar Panels to the Inverter. They claim that AC cable causes a greater voltage ...
3
votes
1answer
53 views

Costs of transportation

I assume that it makes sense to ask for the energy costs of transportation of different goods per weight and volumetric mass density, depending on the means of transportation (truck, train, ship, etc.)...
4
votes
0answers
69 views

In the UK, is it ok to recycle plastic food packaging along with carrier bags?

I live in the UK and do most of my groceries shopping online. At the same time I collect my order I can also hand back to the driver all carrier bags from my previous order (which is great). Some ...
4
votes
2answers
82 views

Is it possible to make homemade bone meal?

Like many people, we eat some meat, and the resulting bones need to be dealt with after the hens have finished cleaning them or they have been used for stock. I have been burying some bones but am ...
2
votes
3answers
132 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 ...
4
votes
1answer
68 views

Seaweed snacks without lots of packaging

My kids like seaweed snacks but there’s so much packaging. Alternatively I can buy crackers or raisins in large packages, reducing both the cost and packaging (plus if the package is cardboard it’s ...
4
votes
2answers
76 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
0answers
36 views

Is an air to water heat pump appropriate to keep a hot tub at temperature throughout the year (hot tub to run 24/7)

Is an air to water heat pump appropriate to keep a hot tub at temperature throughout the year (hot tub to run 24/7). Presumably if the efficiency is greater than 1 even at the lowest temperatures (say ...
2
votes
0answers
28 views

What are the root and aboveground dimensions of a cotton plant at its largest?

I'm experimenting with optimal cotton growing techniques using the least amount of water required and plan on growing a cotton plant in simulated field conditions. That said, I need a large enough ...
5
votes
1answer
70 views

Is electricity used at night more likely to be renewable?

Discussing charging my electric car with a colleague recently I argued that since (in Ireland) our renewable energy sources are mainly wind and hydro, since I charge my car at night the mixture of ...
-2
votes
1answer
43 views

Best sunflower for seeds

For a while now I would like to plant sunflowers in my garden that actually give seeds. After some visits in some department stores and looking online I realized most sunflowers nowadays are for ...

15 30 50 per page