The two sources disagree on the effectiveness and feasibility of recycling programs in schools. Source 1 emphasizes that school districts' participation in recycling is necessary for reducing greenhouse gas emissions and having a positive environmental impact. In contrast, Source 2 points out the challenges and potential ineffectiveness of recycling programs due to the difficulty of getting all students to follow a specific program. Therefore, the fact on which the two sources disagree is:
There are too many people in a school district to follow one plan.