All Questions

2
votes
2answers
65 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
23 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
137 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
19 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
57 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 ...
-1
votes
0answers
23 views

cider vinegar does it keep gnats flies away

i have out a glass jar of apple cider vinegar and they still come how do i keep the pests out and away. this only attracts them and some get into the compost even sticky traps are the same some still ...
3
votes
1answer
43 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
votes
0answers
36 views

Livestock production costs

Can anyone please point me to some resource that would detail land/energy/crops/cost requirements for raising livestock as opposed to raising crops? One staunch meat eater claims that if everyone ...
1
vote
1answer
65 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
26 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
29 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
30 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
33 views

Objective Index of environmental impact of consumer goods and food [on hold]

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
56 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
36 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
52 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
24 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
59 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
176 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
47 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
58 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
44 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
83 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
31 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
17 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
41 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
61 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
30 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
51 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
68 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
78 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
130 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
39 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
56 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
34 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
69 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 ...
0
votes
1answer
53 views

If I plan to drive on soft ground, what can I do to avoid sinking in?

I'm expecting tons of wood chips to be dropped off in part of my yard every day this year, and am wondering what I need to do so the arborist can easily drop them off as close to where I want them as ...
3
votes
4answers
93 views

Best Uses for Scrap Aluminum

Much to my dismay, my apartment building recently canceled their recycling program. My household generates a fair amount of waste aluminum cans that we were previously sending to the local recycling ...
2
votes
0answers
33 views

Does a solar thermal hot water system make sense for my home?

Currently my house has a natural gas-burning hot water heater, with a 40 gallon (150 liter) tank. Given the vintage, the efficiency of this heater is likely around 80%. A new, drop-in replacement ...
6
votes
0answers
56 views

How do you decontaminate land?

How do you decontaminate land that has been contaminated with various toxic materials? Is it safe to just unearth everything? I live around a lot of contaminated fields and it looks like companies ...
1
vote
2answers
41 views

What are the concrete impact of not recycling textile?

Examples: CO2e emitted, harm to the ecosystem, resources depleted, cost to the economy, etc. Context: I have a piece of clothing that is broken that I want to get rid of, and I want to know if it's ...
2
votes
0answers
41 views

Is there a “break even point” or life cycle analysis directory or calculator that's kept up to date?

I've seen plenty of one-time calculations dedicated to one specific thing (usually plastic vs metal straws, or reusable vs disposable cups) but don't know of any organizations or even blogs that ...
0
votes
1answer
36 views

Charge controller reading voltage but no amps

So I have a small solar setup (100w/200ah) in my camper van. I left the controller/panel/batteries hooked up thinking I would occasionally clear the snow and there would let the sun topped the ...
1
vote
1answer
42 views

What actually happens to LDPE Type 4 plastic when it is recycled?

When LDPE Type 4 plastic used in plastic wrapping is recycled, what is it used for?
0
votes
0answers
39 views

When laying wood chips is it better to put down cardboard on top of grass, or just leave it as is?

I'm going to be putting down about 2,000 yards of wood chips on a garden (to kill off all the plants there) in an area on the edge of a swamp this year, and am wondering if it would be just as ...
1
vote
2answers
71 views

What percentage of LDPE Type 4 plastic that you hand in to be recycled is in fact recycled?

What percentage of LDPE Type 4 plastic that you hand in to be recycled is in fact recycled into something useful? I ask this because I read that China stopped accepting plastic to be recycled ...

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