Goods safe for environment
no.
See the related link for the symbol.
no
No element is the symbol for toxicity. The symbol of it is a skull and crossbones. A picture of it will be linked and found in related links
No.
Scroll down to related links and look at "Loudspeaker symbol and google images".
See related link.
Math
The pyramid with an eye, known as the Eye of Providence or the All-Seeing Eye, has different interpretations depending on context. In many cultures, it is a symbol of divine providence, enlightenment, or spiritual insight. However, in some conspiracy theories, it is associated with surveillance, control, or secret societies. Ultimately, the symbolism can be positive or negative depending on personal beliefs and the specific context in which it is used.
No, it was actually a Hindu symbol for strength and unity prior to WWII
The symbol for Saturn is ♄ and it represents the god's sickle. See related link for a pictorial.
I think you are referring to the Unitarian Universalist symbol. See the related link.