The pollution resulting from industrialization and the use of certain substances is leading to the destruction of all forms of animal and plant life and consequently of all sources of food. The reckless deforestation of some areas of the third world, which has not been accompanied by any reafforestation, has worsened the situation and has caused the desertification of arable land. The right to adequate food is not simply a matter of the abundance of food, but also of its quality. The struggle against the widespread increase in malnutrition among vulnerable groups is one way of working towards the realization of the right to adequate food. The rising costs of food, declining food security, lower production costs and cutbacks in public subsidies on basic foodstuffs are also obstacles to the realization of the right to adequate food. Nowadays, many families spend most if not all of their income on food.