How to know which journal is open access?
I have searched many journals homepage which give an option "Supports Open Access"
But I know open access journals after accepting papers charge huge amount of money from authors which I wont be able to give.
So can someone please help me to understand how to be sure that I dont fall into such traps and I submit in those journals which charge money after accepting my paper?
The following link is of Discrete Maths which is a top-journal. Still it states open access. https://www.sciencedirect.com/journal/discrete-mathematics/articles-in-press
If someone helps me to know how to understand it,I will be really very grateful.