Scientists and architects are actually creating buildings that are giant air purifiers. This is accomplished by covering the façade of the building with titanium dioxide which can break down pollutants into less harmful chemicals. Researchers claim it can neutralize pollution from 1000 cars daily. Manuel Gea Gonzalez Hospital in Mexico is one example of this type of construction. Plans are being made to construct smog consuming buildings in Milan and London. There is also great interest in the US at the National Institute of Environmental Health Sciences. Since smog causes one in eight deaths, if this type of architecture becomes common practice, it can possibly put a dent is world pollution.