Study the picture below (attached) and answer the questions that follow. 3.1 Provide a suitable heading for the graph.   3.2 Identify the independent variable.   3.3 What is the unit of the dependent variable?   3.4 Write a conclusion for this investigation.   3.5 How many complete ‘deep exhalations’ occurred in this investigation?

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Environmental health and hazards

An organism's environment is the environment in which it lives and has an impact on its well-being. The World Health Organization (WHO) defines environmental health as "those aspects of public health, such as quality of life, that are influenced by physical, chemical, biological, social, and psychosocial components in the environment." Environmental health is concerned with both natural and man-made settings in order to enhance public health. Environmental science, occupational medicine, toxicology, and epidemiology are the key subdisciplines of environmental health.