Population size (millions) 1. Examine the following graph. It shows the pattern of population growth in Canada over the last 150 years. 35 30 25 20 15 5 0 1850 1870 1890 1910 1930 1950 1970 1990 2010 a. Explain how our population can still be growing when the birth rate has been about 1.6 children per woman since the 1980s. b. List two factors that likely contribute to Canada's relatively low birth rate of about 1.6 children per woman and describe how each factor can affect the birth rate. c. If Canada's population were to start declining in the next few years, would this automatically translate into a lower ecological footprint for the average Canadian? Explain your answer. 10

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Nutrition and diet

We are involved in several daily activities. These actions need a significant quantity of energy. The food we eat provides this energy. Food is necessary for development, repair, and other living activities since it supplies energy. All of these are part of the living practice known as nutrition. Nutrition is the study of nutrients in food, how the body uses them, and the relationship between diet, health, and disease. Nutritionists employ concepts from molecular biology, biochemistry, and genetics to understand how nutrients affect the human body. Nutrition also looks at how people can use their diet to reduce their risk of disease, as well as what happens when they ingest too much or too little of a nutrient and how allergies emerge.