All countries should give priority to measures that improve the quality of life and health by ensuring a safe and sanitary living environment for all population groups through measures aimed at avoiding crowded housing conditions, reducing air pollution, ensuring access to clean water and sanitation, improving waste management, and increasing the safety of the workplace. Special attention should be given to the living conditions of the poor and disadvantaged in urban and niral areas. The impact of environmental problems on health, particularly that of vulnerable groups, should be monitored by Governments on a regular basis.