p. Implement reforestation programmes as a means of checking the rate of desertification of arable lands and preserving their fertility; q. Prevent the destruction of natural resources of the country, in order to protect the right to food and health of future generations; r. Assist individuals to meet their duty to feed their dependent family members, according to available means; s. Ensure that the diet as a whole contains a mix of nutrients for physical and mental growth, development and maintenance, and physical activity that are in compliance with human physiological needs at all stages throughout the life cycle and according to sex and occupation; t. Ensure that food is free from adverse substances through establishing requirements for food safety and for a range of protective measures by both public and private means; u. Take measures (including the adoption of food standards and transparent labelling) to reduce food adulteration and contamination and to improve the quality and safety of food, at market and storage levels, as well as food hygiene at all levels; v. Take measures to disseminate knowledge of the principles of nutrition; w. Take appropriate steps to ensure that activities of the private business sector and civil society are in conformity with the right to adequate food; Vulnerable Groups, Equality and Non Discrimination 50 x. Ensure the accessibility of food to members of vulnerable and disadvantaged groups through, if necessary, special programmes, including land reform schemes. The comparative poverty of vulnerable and disadvantaged groups must be taken into consideration; y. Set up concrete programmes to assist members of vulnerable and disadvantaged groups by directly supplying them where necessary with quality food in sufficient quantity; z. Ensure that all persons imprisoned or detained in any manner receive adequate and acceptable food that meets daily standard nutritional requirements. Further, authorities should ensure that imprisoned and detained persons are allowed food brought to them by their relatives and friends.