1. Introduction
  1.1 Background
  1.2 Objectives
2. Anatomy and Physiology of the Skin
  2.1 Structure of the skin
  2.2 Functions of the skin
3. Environmental Factors Affecting Skin Health
  3.1 UV Radiation
      3.1.1 Effects of UV radiation on the skin
      3.1.2 Protection against UV radiation
  3.2 Pollution
      3.2.1 Impact of pollution on the skin
      3.2.2 Strategies to minimize the effects of pollution
  3.3 Temperature
      3.3.1 Effects of temperature on the skin
      3.3.2 Maintaining skin health in extreme temperatures
  3.4 Humidity
      3.4.1 Influence of humidity on the skin
      3.4.2 Managing skin health in different humidity levels
4. Methods for Assessing Skin Health
  4.1 Clinical evaluation of the skin
  4.2 Instrumental measurements
  4.3 Biochemical analysis
5. Case Studies and Research Findings
  5.1 Study 1: Impact of UV radiation on skin aging
  5.2 Study 2: Effects of pollution on skin barrier function
  5.3 Study 3: Influence of temperature on skin hydration
  5.4 Study 4: Relationship between humidity and skin elasticity