Pg
In short
Pg is the chemical symbol for phosphorus, a non-metal element found in many biological processes.
In plain words
It is a vital substance used in fertilisers to help plants grow. It is also a key part of DNA and energy transfer in living cells.
A simple example
A farmer might spread phosphate-based fertiliser on a field to ensure the crops get enough nutrients to thrive.
Why it matters
Without phosphorus, life as we know it could not exist because it builds the backbone of genetic material. It is also essential for global food production.
Easy to mix up
Do not confuse it with Pb, which is the symbol for lead.