HLSC 1F90 Lecture Notes - Lecture 18: Culvert, Rodent, Extreme Weather
24 Feb 2015
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Ingesting food, water or dust that is polluted. Coming into contact with polluted water, soil, objects. Reliance on fossil fuels for powering machinery & vehicles, heating houses, cooking food, etc. Poor waste management practices (couples with excessive packaging/poor sanitation) 2083: 10 billion growth is due to fertility and life expectancy fertility rates are falling slowly, but infant mortality rates are falling quickly global fertility: 4. 63 now; 2. 5 in 2050. Som holds nutrients and trace elements important to plant growth, prevents nutrient leaching, supports organic acids that make minerals available to plants. Monocultures deplete som, reduce fertility of the soil, lead to reliance on synthetic inputs into the soil- primarily petroleum-based fertilizers which harm/kill micro-organisms and invertebrates in the soil. Depletes the input on which food production depends. Triggers a vicious cycle of increased use of synthetic inputs and reduced biodiversity. Point-source pollutants enter waterways at a specific point (pipe, culvert, ditch)
