This document discusses various sources of water pollution and ways to reduce it through conservation and recycling. It notes that everyday activities like showering, washing dishes, and flushing toilets use significant amounts of water. It then explains how rainwater can be recycled from rooftops to reuse around 600 liters per 100 square meters of roof annually. The document also outlines different types of pollution including chemical pollution from industry, domestic pollution from household chemicals and waste, negligence from improper disposal of items, and bacteria/viruses from human and animal waste. Maps show the most polluted areas in France and images depict waste accumulation in rivers. The key message is that pollution threatens water supplies so conservation and recycling efforts are needed.