Running is being used as a gerund working as a noun
Roxanne's purpose of writing this letter is to convince the city council to restart the curbside recycling program.
Explanation:
The starting statement clearly states that Roxanne wants to ask the city council to reconsider the decision to end the curbside recycling program in their town which means that they are ending the recycling program and Roxanne wants them to restart it as he tells the benefits of the program by stating how it keeps community cleaner and keeps the waste out of landfills by recycling things that would normally go into trash. Hence, we can say that Roxanne's purpose of writing this letter is to convince the city council to restart the curbside recycling program.
