PhysicsSolar-powered nanotech could automatically defrost your car A new material that harvests energy from the sun has promising defrosting abilities, so could make life easier for winter drivers ¿ìè¶ÌÊÓÆµ
TechnologyA cheap pollution sensor will keep you off the dirtiest roads This wearable device reveals exposure to the three worst pollutants, linking it with online maps to help you avoid poor air, a bit like a Fitbit for pollution ¿ìè¶ÌÊÓÆµ