Additional (text) icons for NOx and VOCs

[dirrgang]

Before submitting a new icon request, please confirm the following:

• I have searched all issues to make sure there isn't a request for this icon.
• I have searched the current library to make sure the icon doesn't already exist.
• I understand that brand icons are no longer being added and I can use SimpleIcons for my brand icon needs.
• I only intend to request a single icon (or a few near-identical ones) in this issue.

What would you use this icon for?

For the use with sensor entities it would be useful to also have icons for common things that are measured, such as NOx and VOCs.

Give us an example of what this icon might look like.

Something in the similar style as the molecule-co2 symbol would suffice. Is there documentation how it was originally done? Font and such? I'd be happy to try and create it myself.

[scriptengine]

+1 for a VOC icon please

Air Quality is increasingly in the media and is a concern to many people.
Air Quality is made up of different things, one is particulates (see #7273 )
Another completely different thing is VOCs (harmful chemicals in the air)

If I was looking at a display of Air Quality with particulates and VOCs on (and maybe other stuff) I would want to see a icon for VOCs (and NOXs) that made it immediately obvious where the VOC data was.

PS: (There is a second request as #6405 )

The icon needs to be "chemicals in the air",
Maybe a cloud with chemical symbols in ?

Given, "we" "need" icons for

• VOCs
• NOx
• Particulates (10, 2.5 and 1)
• And probably a general air quality icon

Would it make sense to standardise on a cloud (or similar) with the label in for each type of Air Quality metric?
ie like: https://www.freepik.com/icon/smoke_4429947

Existing:
Best, left hand of:
https://as2.ftcdn.net/v2/jpg/04/49/34/85/1000_F_449348559_yq020Nlysxqg5yUWUG6POWAECHlxRR59.jpg

https://thenounproject.com/icon/voc-5454781/
https://t4.ftcdn.net/jpg/06/19/41/37/240_F_619413772_okaHWNUxdUTZRbwCACuqwXB8COmBCCWe.jpg

There are many examples of it done badly (too complex)