Water conservation includes policies and strategies to sustainably manage fresh water resources and meet human demand. Common strategies implemented at the local level include public outreach campaigns, tiered water pricing, and outdoor water use restrictions. Cities often require or encourage water-efficient landscaping to reduce outdoor usage, which is a major source of residential water consumption in dry climates like California. Proper conservation is important both because fresh water is a limited resource and treating/distributing water has environmental and economic costs. Simple practices like checking for and fixing leaks, installing efficient fixtures, and reducing outdoor watering can help individuals conserve water.