Alarming rise in CO 2 concentrations presents continuing global challenge . Chemicals in carpet can linger long after exposure . Vapor recovery system captures and recycles air pollutants . As Greenhouse Gases Drive Climate . Global bickering over a dimmer switch on the Sun .
Manufacturers use chemical additives to mask environmental tobacco smoke .
UF technique detects tiny, potentially harmful airborne particles . Scientists Combine Chemistry and Bioremediation to Clean Cadmium From Soil . To Clean Up The Air . Arctic temperatures warmest in past four centuries, study says . Reaction Removes Radiation, Take up Toxins .