13 votes
Accepted

Which consumes more carbon dioxide: a fully grown forest or a newly planted one that is growing?

A forest of old trees sequesters more carbon per year than a forest with the same quantity of young trees. When I first saw this question I thought I knew the answer -- trees grow faster when they're ...
LShaver's user avatar
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12 votes
Accepted

For the exactly same income, does a person pollute more when living in a big city or in a small town?

Quick summary: The city and the country both have positives and negatives in pollution production... the data here suggests perhaps the urban core produces slightly less pollution (depending upon how ...
JeopardyTempest's user avatar
8 votes

How do I get rid of numerous small pieces of charcoal?

You are talking about black gold that has a value of AU$40 per 25 litre bag in my area. I would suggest either selling it or putting it back into the soil. See https://en.wikipedia.org/wiki/Biochar ...
Tim's user avatar
  • 2,824
8 votes
Accepted

Does my facial scrub contain microplastics?

Ingredients I used beatthemicrobead.org to check the ingredients which gave the following: The following ingredients are considered microplastics: carbomer: environmental impact article ...
p7dxb's user avatar
  • 223
7 votes

Which consumes more carbon dioxide: a fully grown forest or a newly planted one that is growing?

As LShaver writes, larger trees sequester more carbon than smaller trees, but only if they are still growing. In a "fully-grown" forest (as per the title) that process has ended — decay and regrowth ...
Tim's user avatar
  • 2,824
7 votes
Accepted

Does 1 container ship really pollute as much as 50,000,000 cars?

It depends on how you define "pollution". Cargo ships use some of the dirtiest fuels available: bunker fuel is basically what's left over after you refine all the good stuff out of crude oil....
Mark's user avatar
  • 608
5 votes
Accepted

Why refrigerant cooler is more popular than evaporative cooler?

You have to also consider the climate where each type of cooler will be used and how each type of cooler works. Refrigeration coolers transfer heat from inside a building to the outside. However, the ...
Fred's user avatar
  • 3,507
5 votes

Cleaner alternatives to gear and chain oils

Commercial/ Factory designs have been replacing the power transmission of "lubricated chains" and "gear mechanisms" with high performance "Timing Belts" made of special polymer composited with steel ...
Alex S's user avatar
  • 346
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
5 votes
Accepted

Does oil spilled in backyard contaminate groundwater?

I question the blanket assertion of 1 liter of oil contaminating 1 million liters of water. That's 1 part per million. This article: https://www.who.int/water_sanitation_health/water-quality/...
Sherwood Botsford's user avatar
5 votes

How is "recovered ocean bound plastic" any different from recycled plastic?

Ocean-bound plastic refers to all plastic on land within a 50 kilometer (30 mile) distance of the ocean. The term was popularized by Jenna Jambeck PhD, a professor at the University of Georgia, who ...
THelper's user avatar
  • 14.5k
4 votes

Dealing with waste in countries without waste management infrastructure

I compost all organic material, with the exception of paper. I bury meat and animal bones bc it can attract other animals. I have been known to re-use cardboard as a one-season box garden. It may be ...
flummingbird's user avatar
4 votes

How can we all together clean up the vast plastic carpets in our oceans?

Prevalence of garbage in the oceans A recent study in Nature Scientific Reports finds that the "Great Pacific Garbage Patch" is massive, and keeps growing. From the article, "Evidence ...
LShaver's user avatar
  • 11.9k
4 votes

Dishwasher or paper plates: which are worse?

I'm not typically an answer-my-own-question kind of person, but this has been on the back of my mind for days. The challenge in answering this is that we do not have an apples-to-apples kind of ...
Brian Risk's user avatar
4 votes

What measures could be taken to decrease the air pollution in a big city?

Plant a lot of trees -- assuming you mean partciulate pollution: See for example Estimating the removal of atmospheric particulate pollution by the urban tree canopy of London, under current and ...
Chris H's user avatar
  • 2,126
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

Is plastic recycling mostly green washing?

Great questions and important ones Is plastic recycling really not a viable solution? Sustainability talks about 3 Rs: "reduce, reuse, recycle" and "recycle" is the last R. Hence ...
rokpoto.com's user avatar
3 votes

How to prevent pollution caused by a taxi rank? Is there a solution to the 'edging forward' cost of cars in a queue?

Have the taxis (*) fill two or more lanes (| |) leading to the station, with one ready to pick up the next passenger (:)) coming out. |*|*| |*|*| |*|*| |*|*| :) * Once that cab ...
LShaver's user avatar
  • 11.9k
3 votes

Is there a scientific consensus whether lifestyle or amount of human population the biggest problem

There are a couple of errors in your question. Firstly regarding environmental damage in pre-industrial times, in the Middle East they ran out of trees over two thousand years ago and had to import ...
Christopher Gilmour's user avatar
3 votes

What measures could be taken to decrease the air pollution in a big city?

This brochure of the European Environmental Bureau gives 12 good tips to reduce air pollution in a city. Here a summary and some extra information I added: Create Low Emission Zones (LEZ): charge or ...
agold's user avatar
  • 179
3 votes

How to prevent pollution caused by a taxi rank? Is there a solution to the 'edging forward' cost of cars in a queue?

A variant of the system suggested by @LShaver, would be to use the numbered ticket system sometimes found in supermarket deli counters. Each arriving taxi takes a sequentially numbered ticket (which ...
Nick C's user avatar
  • 783
3 votes

How to design a taxi rank to charge electric vehicles whilst waiting for fares?

You could have a number of electric charging booths dedicated to taxis which consist of a parking space and an electrical charging point. We allow a maximum of 3 taxis to wait directly outside the ...
atreeon's user avatar
  • 667
3 votes
Accepted

Motor oil and environment

Here is a document from the National Park Service which summarizes a lot of information about environmental effects of used motor oil. It includes references to many other papers. The primary ...
Mark's user avatar
  • 333
3 votes

How is "recovered ocean bound plastic" any different from recycled plastic?

I've found two websites with similar definitions of recovered ocean-bound plastic: Website 1, Recovered Ocean-Bound Plastic as plastic waste collected from land areas where the plastic would ...
Fred's user avatar
  • 3,507
2 votes

Are The Great Lakes Getting Cleaner or Worse?

This is more like a comment than an answer, but I have insufficient rep to comment. I think the short answer is that we lack the data to say for certain. And it definitely does depend on what ...
Courtney S.'s user avatar
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

Types and quantities of air pollutants by fuel, per kWh, for electricity generation?

I found this interesting research paper that answers some of your questions, at least for US power plants. For people who don't like to read research papers, there's an easier-to-read summary in this ...
THelper's user avatar
  • 14.5k
2 votes
Accepted

Comparing train station pollution with smoking

On average, smoking one cigarette results in inhalation of roughly 600 billion ultrafine particles (UFP). From a joint research study by universities in Lebanon, the U.S., and France: "Comparison ...
LShaver's user avatar
  • 11.9k
2 votes

Dealing with waste in countries without waste management infrastructure

The question has two general aspects. First how to collect plastics efficiently and second how to treat it afterwards. Best supporter for collection is to generate a value that people perceive and ...
Salt's user avatar
  • 929

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