How can I prevent my drawings and paper from yellowing over time? Some paper just yellows over time, especially if left out somewhere where it sees sunlight.

Acid-free paper is a partial solution, but not terribly budget-friendly.

Is there something else I can do in order to ensure the longevity of my work? I'd be using a variety of pencils and pastels, including charcoal. Is there something I can apply to the paper before or after drawing on it?
I posted an answer to a similar question on this Exchange.

"The reason [paper turns] yellow is because the paper is made from wood pulp and not cotton. Wood is made up of lignin and cellulos. The yellowing in the result of lignin, still present in the fibres of your paper, oxidizing when exposed to sunlight and air."

"To save [the] paper I would recommend two things, 1) Neutralize the residual acids and 2) Seal the paper from contact with the air."

Details here:

How to remove the yellowish color from my old drawings?