Islam emphasized the internal purity of man that is achieved through the purity of the mind in realizing the Right and the purity of feelings through having the pure intention towards man, far away from the meanness of malevolence and hatred and through the purity of the movement that is not lunched except for the sake of justice, Good and life.
In almost every instance, air and water quality goals were met more cheaply and quickly when we taxed pollution than when we tried to regulate it directly.