Study links TiO2 nanoparticles with potential for brain-cell damage | News Briefs: Ozone, traffic, and developing countries ` Solar power cuts pollution ` Nanotechnology-based consumer products ` U.S. streams faring poorly | Are red blood cells defenseless against smaller nanoparticles? | Still life with nanoparticles | Bacteria may break down popular flame retardant to produce toxics | Capturing "real-world" aircraft emissions | Large carbon sequestration project planned to enhance oil recovery | Mercury model at the top of its game? | Perspective: Mis-lead