HLSC 1F90 Lecture 32: Healthy Planet HLSC Lecter 32
18 Apr 2016
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6-> 7 billion then toke us 12 years. 2083: 10 billion: growth of human is due of fertility & life expectancy. Globally, fertility rates are falling slowly, infant mortality rates are falling even faster. Fertility (developing nations): 4,63 now, 2. 5 in 2050. Percent of the world population these countries had and will have. Water pollution: water pollution can come from 2 sources. Point source pollutants enter a water way at a specific point ( pipe, culvert, ditch) Nonpoint source pollutants seep into the water from broad areas of land (chemical run-off from farmers" fields: most contaminants (98% bacterial, 80% + synthetic) come from nonpoint sources, to be healthy, water sources must be clean, therefore: Be active in political processes that regulate water. Practice good personal water management (don"t dump household water. Don"t over-use water : these steps apply to developed and developing countries, land pollution is a serious human by-product in developed and developing countries.
