HLSC 1F90 Lecture Notes - Lecture 23: Falling Slowly, Water Pollution, Culvert
Document Summary
Human health is fundamentally related to the health of our planet: humans can become ill or die from: Ingesing food, water, or dust that is polluted. Coming into contact with polluted water, soil, objects: contaminaion can come from: Reliance on fossil fuels for powering machinery & vehicles, heaing house, cooking food, etc. Poor waste management pracices (coupled with excessive packaging/poor sanitaion) [ex. Overpopulaion: october 2011: global populaion reached 7 billion. 6-7 billion took 12 years: esimated: 2050: 9. 5 billion. 2083: 10 billion: growth is due to ferility & life expectancy. Although ferility rates are falling slowly, infant mortality rates are falling quickly. Ferility (developing naions): 4. 63 now; 2. 5 in 2050. Water polluion: water polluion can come from 2 sources: Point-source pollutants enter a waterway at a speciic point (ex. Nonpoint-source pollutants seep into the water from broad areas of land (ex.
