An innovative new project by the Los Angeles Department of Water and Power involves using low-tech approaches to conserve water. The project comprises covering the LA Reservoir in 96 million black, so-called "shade balls".
Each shade ball costs around 36 cents, making the entire project worth as much as $34.5 million -- which is still a lower figure than other water-saving alternatives.
The shade balls doubtless make for a highly unusual strategy, but seeing as how they represent cost savings of around $250 million, they are well worth the effort. The initiative is set to prevent the loss of up to 1.4 billion liters of water to evaporation, which is enough to provide drinking water to around 8,100 residents of Los Angeles for an entire year.