Skip to main content
9 votes

Is heating with candles economically and/or ecologically worthwhile?

A related question was asked on SE Skeptics - Is this tealight-flowerpot heater more efficient than just tealights? In the third answer, it is claimed the heat produced by one tea light candle is 0....
Fred's user avatar
  • 3,507
8 votes

Will planting trees around my house save me from pollution?

Pollution Trees (and plants for that matter) can reduce air pollution by trapping small particles (fine dust) on their leaves and by absorbing gases such as nitrogen dioxide, ozone and sulfur dioxide. ...
THelper's user avatar
  • 14.5k
8 votes

Propane vs. natural gas stove - indoor air quality?

Combustion of either propane or natural gas can create dangerous conditions for indoor air quality without adequate ventilation. Propane is a hydrocarbon that ideally consists of length-3 carbon ...
Nic's user avatar
  • 2,899
8 votes

Are EVs actually worse for ambient air quality than cars with combustion engines?

This totally depends on what you consider pollution and how you measure it. If you measure pollution by weight, the vast majority of pollution is carbon dioxide. One liter of fuel produces 2.35 kg of ...
juhist's user avatar
  • 5,089
6 votes

Is there any way to recycle air-pollution into fertilizer?

You can use scrubbers to remove NO2 (or better NOX) and SO2 from exhaust gas emissions. Scrubbers are used in large industrial facilities, power plants, and large ships to clean-up the exhaust gas ...
daniel.heydebreck's user avatar
5 votes

Do electric cars create more particulate pollution than petrol cars?

Battery Weight Batteries are heavy - a Tesla 85kWh battery weighs 540kg. - VW Golf 55.7kWh battery weight 330kg you are looking at around 6kg per kWh. The main part of this argument is based on ...
atreeon's user avatar
  • 667
4 votes

Do electric cars create more particulate pollution than petrol cars?

No. Electric cars emit less particulates. Main sources of particulate emissions from transport are: brake wear tyre wear road wear and resuspension of road dust/soil exhaust Exhaust particulate ...
aucuparia's user avatar
  • 1,072
4 votes

What information is lost when converting other air pollution into CO2e?

Time span. Most of the others are short term. CO2 ultimately depends on the rate biomass increases, and the speed it mixes into the deep ocean. Processes that take very long periods (thousands of ...
Sherwood Botsford's user avatar
4 votes
Accepted

For airlines that have "vowed to offer carbon-neutral flights" how do they say they plan to actually make some flights demonstrably carbon-neutral?

One of the first airlines to initiate sustainability and carbon neutrality in it operations was Qantas. It has a Carbon Action Plan, which includes things such as: Establishing carbon offsetting ...
Fred's user avatar
  • 3,507
3 votes

Are EVs actually worse for ambient air quality than cars with combustion engines?

You need to ask are those numbers realistic: Article says car emitted “5.8 grams per kilometer”. We assume that car has 4 tyres. Kwik-fit (A company that wants to sell tyres, so may be an under ...
ctrl-alt-delor's user avatar
3 votes

What would be a viable and justifiable policy to handle short-term acute pollution incidents across large urban areas such as Delhi?

Delhi has acute pollution issues once a year during the time farmers around Delhi burn the waste after the crop has been harvested, this combined with adverse wind directions or weather conditions ...
Jnanesh Anand's user avatar
3 votes

Why are new cars being built in the UK / europe without Start-Stop technology when it seems it can lower pollution?

The simple answer is because any feature costs money, so car makers won't include it unless they're forced to. On some models it's available as an option for extra cost - which relies on the purchaser ...
Chris H's user avatar
  • 2,126
3 votes

Does Start / Stop technology in cars have an impact on air quality and by how much?

Idling is particularly bad for NO2 emissions, which are a major concern for air quality. Here's an old paper showing that an idling engine emits more NO2 than one driving at 40 km/h, despite emitting ...
Chris H's user avatar
  • 2,126
3 votes
Accepted

EU Real Driving Emissions testing (RDE) - does it factor in real driver behaviour and the inefficient driving habits they often exhibit?

Under RDE [Real Driving Emissions test], a car is driven on public roads and over a wide range of different conditions..... Conditions include: Low and high altitudes Year-round temperatures ...
THelper's user avatar
  • 14.5k
2 votes

Why are new cars being built in the UK / europe without Start-Stop technology when it seems it can lower pollution?

There is another possible reason, just a theory mind. Small cars may pass emissions testing without the need for the technology whereas large cars must have it to pass. In other words, it is not ...
atreeon's user avatar
  • 667
2 votes

My residential colony burns dry grass every year; how can I stop them?

Burning grass is effectively carbon-neutral: the carbon dioxide released will get pulled right back out of the air next year as the grass re-grows. Cutting it and letting it decompose would also be ...
Mark's user avatar
  • 618
2 votes

Preventing idling - ideas to keep warm in a car when the engine is off and it is cold outside

It's possible to fit a dedicated heater run off the fuel system. This is a much more efficient way of turning fuel into cabin heat. They're common in motorhomes in a form that directly heats the ...
Chris H's user avatar
  • 2,126
2 votes

Preventing idling - ideas to keep warm in a car when the engine is off and it is cold outside

Wear a woolen underlayer (woolen socks + woolen long sleeve t-shirt + woolen long pants) Wear warm clothes (hat, snood, scarf, warm jumpers, warm trousers) Wear winter driving gloves (or any warm ...
atreeon's user avatar
  • 667
2 votes

Does Start / Stop technology in cars have an impact on air quality and by how much?

A car stationary but left running (idling) will cause pollution in that specific location; start stop technology could avoid the pollution responsible for idling. Here I will concentrate not on the ...
atreeon's user avatar
  • 667
2 votes

Is there any way to recycle air-pollution into fertilizer?

Just found a patent for this: https://www.google.com/patents/US20070154374 Method for removing sulfur dioxide and other acid gases, mercury, and nitrogen oxides from a gas stream with the optional ...
Neel's user avatar
  • 229
2 votes

What impact do CFCs have on ozone?

Yes - CFCs interact with and break down ozone. It's basic chemistry: CFCs are lifted by buoyancy into the stratosphere, where they are broken up by the sun's ultraviolet radiation (1), and the ...
410 gone's user avatar
  • 14.7k
2 votes

Does a single Euro VI bus really release less NOx than a euro 6 diesel car?

Your calculation is incorrect. 1 gallon contains 36 kWh of heat, but only around 12 kWh of that will be turned into useful motive power in an engine with 33% efficiency. The rest, 24 kWh, are emitted ...
juhist's user avatar
  • 5,089
1 vote

Are EVs actually worse for ambient air quality than cars with combustion engines?

The relative contribution of tyre wear and tear to the total global amount of plastics ending up in our oceans is estimated to be 5-10%. In air, 3-7% of the particulate matter (PM2.5) is estimated to ...
Eduardo's user avatar
  • 11
1 vote

Propane vs. natural gas stove - indoor air quality?

The article you say confirms that propane produces the same toxicity and off-gassing as natural gas does not appear to be research related to cooking ranges. The article refers to "jet pools&...
A Winters Gardener's user avatar
1 vote

How effective is a Smoke Control Area at reducing particulates? (UK)

Particulate is a very local issue, so it really, really depends on your local conditions. Particularly your ratio of greenery to urbanity. Downtown London, oh, you betcha - they've had smoke controls ...
Harper - Reinstate Monica's user avatar
1 vote

How is NOx mg/km from diesel cars and trucks related to µg/m3 in the air?

It's phenomenally complicated, poorly understood, and very difficult to model. It depends on the layout of buildings, where and when emissions happen, what the local winds are, and what's happening ...
410 gone's user avatar
  • 14.7k
1 vote

Is pellet fuel a sustainable energy source in the way it's used now?

I think biofuels are extremely destructive to the planet due the the vast amounts of land required to produce a small amount of energy. http://reports.climatecentral.org/pulp-fiction/2/ http://...
John Spence's user avatar

Only top scored, non community-wiki answers of a minimum length are eligible