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1500 questions
7
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3 answers

How can I estimate the gas usage of a pilot light?

Can anyone provide a method to estimate the gas flow rate to sustain a pilot light, using just the apparent size (flame width and length) and reasonable assumptions for things like gas line pressure? Note that we have our gas (propane) delivered,…
half-integer fan
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7
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Is the Air Conditioner water clean and hygienic if I want to collect and reuse the water?

I'm actually unaware about how an Air Conditioner (A/C) works. In our office, our A/C's residue (?) pipe is coming out to the toilet floor, and when the A/C is used there tiny droplets come out continuously. Sometimes I jut put a container under the…
Mayeenul Islam
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7
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5 answers

Freezing Bananas With Less Waste

My wife likes to freeze bananas by removing their skin, wrapping them in aluminum foil, and placing them in the freezer. She eats a couple of bananas per day. So, this is using up a lot of aluminum foil. She tries to reuse the foil as much as…
J126
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7
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2 answers

Building/improving continental trains to replace intra-continent flights?

As the climate change emergency is high, I am wondering whether long-range train service across countries of same continents are being built to limit as much as possible flights (and cars) which are far worse then train in term of greenhouse gas…
Noil
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7
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3 answers

Propane vs. natural gas stove - indoor air quality?

I've seen plenty of articles about gas stoves and the impact on indoor air quality. Specifically, there are reports of much higher CO2, NOx, PM 2.5 particulates, and formaldehyde, relative to electric stoves. However, I can't find any reference…
Eric Marsh
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7
votes
4 answers

What should I pick for sportswear if synthetics are bad (microplastics)?

What should I pick for sportswear if synthetics are bad (microplastics)? It's not a pleasant experience to sweat in cotton clothes (whether organic or not).
Sergey Zolotarev
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7
votes
2 answers

Are electric cars more efficient than gas-powered car (when considering entire energy cycle)?

For the last couple weeks, I've been hearing a lot of talk surrounding Tesla and "the electric car". What I'm curious of is whether or not it is more efficient to actually power an electric car (the power produced by the power plant) over a typical…
Throsby
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7
votes
1 answer

How to protect underground tank water from insects and Algae?

We have underground tanks for water storage, but they are affected by algae and small water insects. I want to protect the water from these. The water is for general life use, except drinking, like washing clothes gardening etc. Are there some…
Yadav Chetan
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7
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2 answers

Are there any experiences with small-scale duckweed farming using domestic wastes or wastewater?

Duckweeds are among the fastest growing higher plants, edible and rich in protein. They grow in lakes that are rich in nutrients, for example from fertilizer runoff. They have been used as tests for water contamination or for the treatment of…
mart
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7
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1 answer

Instructions for making, and comparisons of, *small* solar thermal collectors

The web has probably thousands of pages with instructions on how to build solar devices for heating air, water, and probably things I've never even thought of. Wikipedia describes different types of thermal solar collectors, but really has a…
Highly Irregular
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7
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2 answers

How do atmospheric concentrations of CO2 and NOx vary by city and within cities?

What would a well ventilated port city such as Honolulu, Hawaii, USA have for the concentrations (in parts per million) of CO2 or NOx, compared to a city like Linfen, China which is the site of a large coal industry? By how much would concentration…
7
votes
3 answers

Cost-effective way to solar charge proprietary LiPo tool packs having AC chargers

I'd like to go solar with a couple of our battery-powered tools without a) charging the batteries with DC directly, as they're expensive batteries with their own fancy AC chargers, or b) spending money on other expensive solar batteries to power…
Woahdae
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7
votes
1 answer

Is being a vegetarian really environmentally friendly?

Livestock and manure produce 5,8% of global GHG. But releases from agricultural soils (N2O), crop residue burning, and rice cultivation (all are associated with plant farming) generate 8,9%. So is being a vegetarian really environmentally friendly,…
Sergey Zolotarev
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7
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3 answers

Do SSDs have a lower environmental impact compared to HDDs?

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 claim, although some people say the difference is…
THelper
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7
votes
3 answers

How can I monitor a PV system's performance?

What are things I should monitor to track a photovoltaic system's performance? I'm not looking for a recommendation for a particular piece of kit, because such a recommendation could quickly go out of date, and then the answers would be of no use to…
410 gone
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