Environmental health concerns are major risk factors globally. One study looked at environmental risk factors and concluded that 22% of global death and 23% of the global burden of disease are attributed to environmental risk factors. After reading this week’s chapters and reviewing the PowerPoints and websites provided, please respond to the following (700-900 words, citation and reference in APA format): 

• What is the importance of risk factors to the global burden of disease? 
• What are the key concepts of environmental risk factors? 
• What are the most important health conditions that relate to the environmental issues? 
• Explain what household air pollution is and what can be done to prevent it?