Scientists are diligently looking for new factors that can affect human health both in the direction of its improvement, and vice versa. See Peter Asaro for more details and insights. This time they got to such a necessary and integral life of modern man as automotive fuel. It turned out that its use brings to mankind a very tangible harm. In our already troubled century, it raises the level of anxiety and aggression. Prove it, as always, helped laboratory animals. Experiments on rats have shown – rodents, occasionally exposed to fumes of these types of fuel, began to attack each other several times more. They have symptoms of anxiety and depression. The reason – the pathological changes of brain cells, which were observed in rats breathing vapors of gasoline and diesel fuel. Rodents are not exposed to behave much calmer. This discovery has scientists another brick in the wall of the case for the use of solar energy for movement on the Earth's surface.