8 votes
Accepted

What chemicals are used to replace BPA in plastics?

First of all, in many products BPA has not been replaced at all. It is still present in many types of food packaging, especially in canned foods. AFAIK the main exception is baby bottles which are ...
  • 14.4k
5 votes
Accepted

What is the most environmentally friendly way to paint/preserve wooden art or construction outdoors?

Our preferred solution here (on land and for seagoing wooden boats) is linseed oil based paints, or just plain (raw) linseed oil. The oil soaks in the wood and therefore prevent water to soak into it ...
  • 136
5 votes
Accepted

Does polyethylene film (plastic bags) breakdown chemically?

Unless polyethylene has been pretreated during its manufacturing process it is a very obdurate material, being susceptible to degradation by oxidation and UV light. Degradation can occur with chlorine,...
  • 3,382
4 votes
Accepted

Does decanting eliminate heavy metals in water?

Precipitation and decantation are two different things. If left alone, dissolved heavy metals would never go down to the bottom of a container (countering the gravity pull for an ion over 10 cm costs ...
3 votes
Accepted

Are aluminum sheets appropriate for rainwater catchment roof?

You've raised a few issues in your posts, so having just built a new house I'll address those I'm able to: To start with, I live in a country/area where corrugated steel roofing is the absolute norm ...
  • 2,784
3 votes

How do you decontaminate land?

What you're seeing: biopiles it looks like companies just dig the ground, leave everything in a pile for a while (few weeks?) and then bring over the dirt elsewhere. It sounds like what you're ...
  • 11.7k
2 votes

Alternatives to Naphthalene

As I understand the smell is the problem. The naphthelene masks the smell but it too is a problem. So the issue is "How to reduce the smell" One answer is to cover it up. Anotehr answer is to ...
2 votes

How can I easily detect the presence of insecticides?

If you have a particular location in the room where you suspect they may have been used, you could try releasing some live bugs there (ones that are moderately welcome indoors), eg some jumpy spiders. ...
2 votes
Accepted

What chemicals does copper slag release into the soil or water table when it is recycled as a gravel?

I found a (eventually political) study made by NABU Hamburg from 2013 about copper slag. They state, that several materials are included with toxic and hazardous to health impact, among others (per ...
  • 929
2 votes
Accepted

Is mercury still found in modern e-waste?

The usage of mercury in electronics devices that end up producing e-waste is small but present in some components. Though not widely used now, cathode ray tube (CRT) monitors contain mercury as do ...
  • 3,382
2 votes
Accepted

Do Chipotle style bowls still have PFAS chemicals?

From the the article you referenced, Chipotle is quoted as saying (emphasis added): We’ve been working closely with our suppliers to develop new food packaging that is sustainably sourced, functional,...
  • 11.7k
1 vote

What is the most environmentally friendly way to paint/preserve wooden art or construction outdoors?

In Europe in mediaeval times, the external woodwork of timbered houses was painted with bulls' blood (hence the traditional dark red colour). Apparently it had to be bulls' blood and not pig, for ...
  • 415
1 vote

Are aluminum sheets appropriate for rainwater catchment roof?

As it turns there are several solutions. And as I've discovered, the headline is: aluminum is probably fine. HOWEVER ... in my case I think it will be cost-prohibitive, since a 4x8 sheet costs ~$100. ...

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