LESSON 3 · Water: Earth's Scarcest Treasure
The Modern Water Toolkit
Saving water has moved well beyond simply asking people to use less, leaning on smarter technology and economics. A few approaches are gaining real traction:
- Drip irrigation delivers water straight to plant roots, running 90–95% efficient versus the 50–70% of flood irrigation it replaces
- Leak detection and repair plugs distribution networks, where the average city loses roughly a third of its treated water before it reaches a tap
- Water reuse recycles treated wastewater for farms, industry, and even drinking supplies
- Smarter water pricing and demand management reward conservation instead of waste