In neuroscience a number of new techniques have been developed by means of which it has become possible to study the activity of the living human brain. By means of these techniques we are beginning to understand the neurophysiology behind environmental attitudes and preferences. The mechanisms involve links between the sensory and control parts of the cortex and specific nuclei for reward and aversion, amongst others located in the limbic system of the brain. Such links are highly resistant to extinction and have a lasting effect on the individual’s behaviour later in life. However, the highly flexible human brain is constantly prepared for revisions and additions even later in life.