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Great Lake:20% fresh water in the world////secound one (Lake Erie (dead…
Great Lake:20% fresh water in the world////secound one
Lake superior
largest
deepest
Lake Erie
smallest
shallowest
most developed watershed
most biologically productive
dead zone
where: central bottom of lake
How: the dead algae sink down to the bottom of the lake. Then bactera decompose those dead algae. This process will used up the O2 in the bottom of lake.
warm, shallow water promotes algae growth
fishing
process of formation
melting glacial
Lake Michigan
only one entirely in US
Lake Ontario
smallest of surface area
Lake Huron
water in the world
97.5 salt water
2.5 freshwater
1.75% in the caps and glaciers(mostly Antarctica)
0.7-0.8 ground water
< 0.01% of all of our plants water occurs in freshwater lakes and rivers
pollution
metals: Hg, Cr, Cd, As, Pb
organic compounds: PAHs, PCBs, Dioxins (pesticides/herbicides), DDT, Chlordane, Mirex
Effects: Toxic, carcinogenic, Endocrine Disruptors persistent, fat-soluble