It should be noted, however, that there are multiple reasons for continued poverty, including lack of education, poor healthcare, political crises, poor access to credit and the like. Many governments are adopting or have adopted sector-specific policies such as Sustainable Public Procurement (Chapter 10), codes and standards for Sustainable Cities (Chapter 9) or Sustainable Tourism (Chapter 11). Others have formulated policies which mandate land usage, waste disposal, effluent discharge, energy efficiency, minimum wages, working conditions and the like and have implemented these through legislation, fiscal incentives or a combination of both.