This document discusses the recycling of used oil and proposes solutions to improve current practices. It notes that one liter of discarded oil pollutes 1000 liters of water, and each resident discards around 4 liters of used oil per year. While purification costs the government €2.50 per liter, many still pour oil in the trash. To address this, the document suggests installing more oil collection containers, promoting awareness of oil recycling's importance, and collecting oil directly from households once a week to make recycling easier and incentivize participation.