The two sources disagree on the effectiveness and feasibility of recycling programs in schools. Source 1 emphasizes the importance of participation from school districts for recycling to have a positive environmental impact, suggesting that it can be successful if everyone participates. In contrast, Source 2 highlights the challenges of getting all students to follow a specific recycling program and implies that doing so may lead to ineffectiveness.
Thus, the fact on which the two sources disagree is: There are too many people in a school district to follow one plan.