PERCEIVED COGNITIVE LOAD OF EXTENDED REALITY SERIOUS EDUCATIONAL GAMES ABOUT CLIMATE CHANGE: Received: 27th August 2023 Revised: 9th November 2023, 28th November 2023, 1st December 2023 Accepted: 14th September 2023. Docens Series in Education, v. 7, p. 25–43, 19 Jun.2024.