"Controversial issues" refers to topics or subjects that can cause disagreement or debate among people because they involve strong opinions and varying perspectives. Full definition
This case highlights the often controversial issue of the extent to which an employer has a duty to accommodate. (toronto-employmentlawyer.com)
In addition to these questions, you might create an anticipation guide that asks students to indicate their opinions on controversial issues raised in the film. (facinghistory.org)
Teacher evaluation has emerged as one of the most controversial issues in school reform today. (voices.washingtonpost.com)