Use the information from the two sources to answer the question. Source 1: Requiring school districts to recycle will reduce the emissions of greenhouses gases that damage the environment. School districts have many people in them and dispose of large amounts of waste. Their participation is necessary if recycling is going to have an impact on the environment. Source 2: Outside recycling programs can be expensive for schools that need to use their district's money for educational programs and resources. While recycling is important for protecting our planet, getting all students to follow a specific program is not easy and can cause programs to be ineffective. On which fact do the two sources disagree?