All Questions

I'm an undergraduate and for a module I need to gather some data to influence the design of a weather app for a chosen audience. I've chosen farmers in developing countries. I've created a google form ...

Let's say I have a fixed amount of money that I can either spend on a complete solar PV system (panels, inverter, all the hardware and wiring) or a complete wind system (turbine, inverter, all the ...

Is cheese wax compostable? I have some Babybel cheese wax and I was wondering what to do with it.

I know it costs. But we got rid of chlorofluorocarbons and are preparing to eliminate stuff like coal! This in between. Proposal: By international agreement get rid of floatable PE, HDPE and PP and ...

Why is reducing the consumption of recyclables is better than recycling recyclables? Some recyclables can be recycled only a limited number of times (plastics) so I partially understand it. But other ...

Mealworms for birds are a cheap form of nutrition. Could they be processed at home in a way to make them healthy? Dried mealworms are sold as bird food for just under £8/Kg in the UK or $3/Kg from ...

[Cross-posted on Victron's community https://community.victronenergy.com/questions/85929/difference-in-solar-wattage-between-24v-and-48v-sy.html ] Background: I'm on a boat with a 48V system and a 24V ...

I recently replaced a 20-year-old ICE vehicle in need of significant repairs with a five-year-old ICE vehicle. We had hoped that we could buy an EV this time around, but models that meet our needs are ...

HC (I assum hydrocarbons) is a column in the euro emission standards for trucks & buses. Which hydrocarbons are produced and at what quantities? Would the particulate matter emissions be included ...

A transport expert claimed that a Euro 6 car has fewer NOx emissions than a Euro VI bus, surely this cannot be correct?! https://en.wikipedia.org/wiki/European_emission_standards Euro 6b (diesel car) -...

I was arguing with my wife over which dishwasher program to use. I want to use the eco program because it is most environmentally friendly, but she countered that the long program (3:30h) puts more ...

I am beginning to acquire knowledge to assemble my first self-consumption solar kit and I have been investigating what kind of solar panels I should use for a house of approximately 50 m2 with a ...

I live in the Maryland suburbs of Washington DC. On December 31, 2012, I signed a lease deal with SolarCity (now Tesla) to install solar panels on the roof of my home + associated electrical ...

How would one go about calculating the amount of electricity (kilowatt hour) produced from a quantity of, say, 1,000 liters of water per hour falling from a 20 meter fall through a hydro electric ...

I found this site looking for one specifically geared to picking products based on sustainability. I'm not sure if such a specifically-focused site would actually be more effective than this one. The ...

My impression is that carbon offset plans are a rather imperfect and somewhat temporary solution - but still seem to be a step in the right direction, and at least signal consumer demand for green ...

I have used worm bins before that we premade with plastic. They were nested bins such that the bottom of an upper tray was directly touching the scraps piled up in a lower tray. Worked well! Now at a ...

In this question on Super User they say that Solid-State Drives (SSDs) use much less power than traditional Hard Disk Drives (HDDs). I read some internet posts and research articles that backup this ...

I have Resol DeltaSol BX controller for my solar hot water which I would like to configure best for my situation but the wording is a bit puzzling for me to understand. It was installed about 9 years ...

Where I stay, theres a site (see intro here) nearby that used to be a coal gasification plant (produces coal gas for lightning etc.). The plant contaminated the soil with PAHs and heavy metals with ...

Is it possible to have a grid tied solar installation operate when power is out without a battery bank? All of the grid tied inverters I have found kick offline during power outages. This is a fine ...

Edited: I would like to spend money in the most effective ways (local tax considerations included) I understand that in order to be effective at tackling climate change there needs to be action at a ...

I recently asked a question regarding a sustainable way to generate white noise. I received a wonderfully helpful comment from Móż (thank you!) in which Móż recommended ensuring that the power source ...

I would like to create a white noise generation box. I want it to be as sustainable as possible (within reason), as it will likely be used 24/7. My thinking so far is to use an old, unused smartphone,...

Following this question, I'm trying to figure out what is the best option for me. Looking at brand products, for example SunPower Maxeon 3 400/410 Wp and SunPower P3 Black 325 Wp, they offer a power ...

Before the invention and commercialization of refrigeration, many homes had an ice box, designed to store a large block of ice to keep perishables cold (from the National Museum of American History): ...

I spent 2 weeks traveling on my bicycle, and usually I was very hungry.. Since I ate a lot of food, I asked to myself if maybe a train (dividing cost between all passenger) was more green than me! I ...

There seems to be a lot of debate about whether, and how, plastic degrades in a landfill. There are many different types of plastic, from polypropylene to polystyrene. With this variety, it seems ...

Many countries are looking to phase out fossil fuels for domestic heat and hot water within this decade (see related question). Which alternative energy sources will primarily replace fossil fuels? ...

For context: Sweden is said to have the highest carbon price in the world at €110/ton (source). This price only applies to emissions not covered by the EU ETS (about half) which currently trades at an ...

This answer to another question points out that asphalt, a petroleum product, is used in large quantities. If we as a society want to reduce our dependence on fossil fuels, we will need to find an ...

I have heard testimonies of people with various health conditions in which the ingestion of certain botanical supplements improved their health. Then I see the plastic bottle the supplements came in, ...

In my understanding the supply side of the carbon credit market involves a wide range of different methods to sequester or otherwise prevent carbon from entering the atmosphere (renewable energy, fuel ...

I noticed that heat pumps for swimming pools are a lot cheaper than equivalent heat pumps for home use. What could be the reasons for this? To give an idea, a 16kW monoblock heat pump based on R32 (...

Last week, the city of Denver, U.S.A. announced a proposal to ban all new natural gas connections by 2030. From The Denverite: Changes to natural gas rules will come via revisions to Denver’s ...

If you buy an EV then the batteries last for X years. What happens after that? Are they recycled 100%? Are the companies like Tesla collecting those batteries to recycle? If they are not recycled then ...

Some daylighting solutions are available in the market that use collectors and large diameter optic fibre cables to transfer sunlight to interiors of residential or underground dwellings. Below are ...

Suppose I'm already heavily invested in microinverter type solar panels -- with the inverter on the panel on the roof. These comply with UL 1741 and will stop supplying power the moment they see grid ...

I've done some amount of upgrades to my house to reduce my overall carbon emissions, and reading online there are all kinds of suggestions for doing even more: Replace my natural gas water heater ...

Hydroponics using NFT (Nutrient Film Technique) is heavily dependent on inorganic nutrients. However, modern marketing jargons term the food produced as organic and business model as sustainable. ...

Saudi prince, Mohammand bin Salman, announced a future city spread in 170km with no cars and no street. But any place to meet daily needs like schools, medicine and office will not take more than 5 ...

I have 3 stage water purifier installed at my home which first filters the water, performs reverse osmosis and then treats it with UV-C rays. The water that is released at stage 2 (RO) is usually ...

I recently had my old, broken furnace replaced with a high-efficiency condensing furnace. One function of this furnace is that it extracts enough heat from the exhaust gases to condense them into ...

I'm wondering about kinetic energy storage for homes. Imagine a concrete plate resting on hundreds of firmly attached sturdy springs, and a couple of electric winches attached to the top. To store ...

I am wanting to hook up a solar system to my house but don't want to feed back into the grid (for a number of reasons, including legislative bureaucracy and having to change my electricity company). ...

Today the governor of the U.S. state of Massachusetts announced that starting in 2035, gasoline-powered vehicles will no longer be sold in the state. From the announcement (emphasis added, and a "...

According to the U.S. Energy Information Agency, about 23 L (13%) out of every barrel of oil is turned into "other products": The other 150 L or so is turned into things which are burned ...

Copy paper can be purchased in different white tones. The shades of white are defined by the Commission Internationale de l’Eclairage (CIE) and take values from 55 (recycling-grey) to 171 (most white)....

Where I live, cold winters and humid summers rule out line drying for bulky items like blankets and towels for a few months out of the year. When I put them in my electric clothes dryer, which ...

Are there an online resources about brands or outlets? Are there certifications? Wikipedia refers to a 2014 Rank a Brand report about the sustainability of global electronics brands in general. I ...