All Questions

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. ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

Since 75% of the universe is hydrogen would it be sustainable to use fuel cell electricity generators? Fossil fuel generators wont last forever because there is not an endless supply of fossil fuels ...

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?

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 ...

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 ...

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 ...

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 ...

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 ...

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

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. ...

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 ...

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 ...

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 ...

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 ...

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/...

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 ...

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. ...

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 ...

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....

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 ...

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.

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 ...

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 ...

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)...

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 ...

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 :...

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?...

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 ...

It looks like a hubbert curve. Has the wind industry peaked for new installation.

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 ...

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 ...

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 ...

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 ...

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 ...

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. ...

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 ...

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?

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 ...

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 ...

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?

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. ...

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 ...