Answer: A.
Explanation: I hope this helps :) -
 Environmental factors are diverse and far reaching. 
... 
They include: 
Exposure to hazardous substances in the air, water, soil, and food. 
Natural and technological disasters. 
Climate change. 
Occupational hazards. 
The built environment. Goal 
Promote health for all through a healthy environment. 
 
Overview 
Humans interact with the environment constantly. These interactions affect quality of life, years of healthy life lived, and health disparities. The World Health Organization (WHO) defines environment, as it relates to health, as “all the physical, chemical, and biological factors external to a person, and all the related behaviors.”1 Environmental health consists of preventing or controlling disease, injury, and disability related to the interactions between people and their environment. 
 
The Healthy People 2020 Environmental Health objectives focus on 6 themes, each of which highlights an element of environmental health: 
 
Outdoor air quality 
Surface and ground water quality 
Toxic substances and hazardous wastes 
Homes and communities 
Infrastructure and surveillance 
Global environmental health 
Creating healthy environments can be complex and relies on continuing research to better understand the effects of exposure to environmental hazards on people’s health. 
 
Why Is Environmental Health Important? 
Maintaining a healthy environment is central to increasing quality of life and years of healthy life. Globally, 23% of all deaths and 26% of deaths among children under age 5 are due to preventable environmental factors.1 Environmental factors are diverse and far reaching. They include: 
 
Exposure to hazardous substances in the air, water, soil, and food 
Natural and technological disasters 
Climate change 
Occupational hazards 
The built environment 
Related Topic Areas 
Cancer 
Heart Disease and Stroke 
Occupational Safety and Health 
Physical Activity 
Respiratory Diseases 
Poor environmental quality has its greatest impact on people whose health status is already at risk. Therefore, environmental health must address the societal and environmental factors that increase the likelihood of exposure and disease.
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