bcdd51df_Facts_and_figures___SciDev_Net__Importance
[Product] Nanosponge for rainwater harvesting [How it works] A combination of polymers and glass nanoparticles that can be printed onto surfaces like fabrics to soak up water [Developer] Massachusetts Institute of Technology, United States [Importance] 
Rainwater harvesting is increasingly important to countries like China, Nepal and Thailand. The nanosponge is much more efficient than traditional mist-catching nets
Nanotechnology for clean water: Facts and figures - SciDev.Net
Importance