Human Activities Harmful to Water:
- Pollution from industrial waste, agricultural runoff, and sewage
- Over-extraction of groundwater leading to depletion
- Deforestation and soil erosion causing sedimentation in water bodies
- Oil spills and chemical leaks contaminating water sources

Conservation Methods for Water:
- Implementing water-saving technologies like low-flow fixtures and efficient irrigation systems
- Harvesting rainwater for household and agricultural use
- Properly managing and treating wastewater before discharge into water bodies
- Promoting water conservation awareness and education in communities
- Implementing policies and regulations to control pollution and over-extraction of water

Explanation:
Human activities such as pollution and over-extraction of water resources have a detrimental impact on the quality and quantity of water available for consumption and ecosystem health. To conserve water for the better, it is crucial to adopt sustainable practices and technologies that reduce water wastage and protect water sources from contamination.
By implementing water-saving technologies like low-flow fixtures and efficient irrigation systems, individuals and businesses can significantly reduce their water consumption. Harvesting rainwater for non-potable uses such as watering gardens or flushing toilets can also help to alleviate pressure on freshwater sources.
Proper management and treatment of wastewater before discharge into water bodies are essential to prevent further pollution. It is important to raise awareness about the importance of water conservation and educate communities on ways to reduce their water footprint. Additionally, enforcing policies and regulations to control pollution and over-extraction of water resources is necessary to ensure the long-term sustainability of water sources.