In This Edition:
-Children may have highest exposure to titanium dioxide nanoparticles
-Dust from industrial-scale processing of nanomaterials carries high explosion risk
-Climate change may increase risk of water shortages in hundreds of U.S. counties by 2050
-New evidence that bacteria in large intestine have a role in obesity
-New "smart pills" signal your iPhone to notify the doctor - and more from innovative drug company partnerships
