A study at Harvard [1] has found an obvious link between pollution from automobiles and lower IQ in children. This news is according to the anti- traffic group that's pushing for the approval of Mayor Bloomberg [2] 's traffic congestion plan [3] to lessen the amount of traffic throghout the city of New York.
The study looked deeper into black carbon levels emitted from car exhausts and engines. Through this study they have discovered a 4% drop in I.Q. levels comparable to the effect of smoking while pregnant said Environmental Defense [4].