EESA11H3 Chapter 1: Chapter 1 Book notes

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19 Apr 2011
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Human impacts: of earths land has been transformed. Increase in greenhouse: less freshwater, nitrogen fixation. Provisioning food (plants and animals), water, fuel (such as wood and dung) Regulating climate (including temperature and precipitation), water puri_cation and waste treatment, pollination, preventing soil erosion (as with grasses and trees), storm protection (as with mangroves and coral reefs) Supporting services necessary to produce other ecosystem services including soil formation, nutrient cycling, production of oxygen (from photosynthesis) China-> yangatze river had a flood because of deforestation so they banned clear cutting. Climate change is caused by increase in co2. 20 u. s. a-> cities had 30% decline in tree cover over 3 decades. www. notesolution. com. Pollutant: any substance introduced uinto the environment that adversely affects the usefulness of a resource. 1 ppm = 1 pound contaminant in 500 tons (1 million pounds) 1 ppb = 1 pound of contaminant in 500 000 tons. 1 ppt = 1 pound of contaminant in 500 000 000 tons.

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