0 6629 6637 6643 6647 6653 6655 6659 6665 6667 6673 6679 6683 6685 6689 6695 6697 6703 6707 6709 6713 6715 6719 6721 6723 6724 6725 6727 6728 6729 6731 6733 6737 6739 6743 6745 6749 6755 6757 6763 6767 6769 6773 6779 6785 6787 6793 6797 6799 6805 6809 6815 6823 11751 （4）Loops, pools, and fluxes ?The hydrologic cycle has four physical processes:evaporation, condensation, precipitation, and gravitational flow ?It also has three major loops ?Evapotranspiration loop: green water that evaporates and returns by precipitation ?The main source for ecosystems and natural agriculture ?Held as capill 1）Other loops of the hydrologic cycle ? Surface runoff loop: blue water across the ground’s surface ? Groundwater loop: blue water that infiltrates, percolates, and joins groundwater ? These two loops are the focus for human water resource management ? The hydrologic cycles “fluxes”: the exchange of water among land, atmosphere, and oce （5）Human impacts on the hydrologic cycle ?Many environmental problems stem from direct or indirect impacts on the water cycle ?Four categories of impacts: ?Changes to Earth’s surface ?Changes to Earth’s climate ?Atmospheric pollution ?Withdrawals for human use ①Changes to the surface of the Earth ?In natural systems, vegetation intercepts precipitation ?Water infiltrates into porous topsoil, filtering out debris ?Evapotranspiration sustains ecosystems and recycles water ?Recharged groundwater reservoirs release water through springs and seeps into streams and river ?In cleared forests and ov ②Climate change ?There is unmistakable evidence that Earth iswarming ?Increasing greenhouse gases are changing the watercycle ?Evaporation increases with a warmer climate ?A wetter atmosphere means more and heavierprecipitation and floods ?More hurricanes and droughts ?Water-stressed areas (e.g., East Africa) will ③Atmospheric pollution ?Aerosol particles form nuclei, enabling water to condense into droplets ?More clouds form?Anthropogenic particles are increasing ?From sulfates, carbon (soot), dust ?Form a brownish haze associated with industrial areas, tropical burning, and dust storms ?Solar radiation is reduced ?Aerosols have a ? Humans use 27% of all accessible freshwater runoff? Nonconsumptive uses of water: water may be contaminated, but is still available to humans? Used in homes, industries, and electric power production ? Consumptive uses of water: the applied water does not return to the water resource ? It is gone ? 37% of domestic water comes from groundwater source 双手 其实我只是不说 I'm only trynna be a better man 逝世 control panel network and internet sharing center change Intimate Lover 这篇文章是以日记的形式写的 这个杰出家未能完成任务的原因是他不能很好地与团队合作 你来自于哪个国家？ ??? ?? ??????? ???????? ??????? ???? ?? ????? ????? ?? ???? ??? Hugh est un non-tout, les larmes aux flux de la langue. 在父母的影响下，我从小就是一个很独立的人 po xiao xie you have no sense of shame I never can not promise to give, once the commitment will give. 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Kerogen: a solid, waxlike hydrocarbon?Refining can produce gasoline and other petroleum products?One ton of shale produces ? barrel of oil?Mining, transportation, and waste disposal are prohibitive?Deposits con ①Oil sand ?Oil sand: a sedimentary material containing bitumen?Bitumen: a hydrocarbon that can be refined like oil?Alberta, Canada has the largest deposits (152 BBs)?The cost is competitive with oil?U.S. imports = 10% of our imported oil?Mining oil sand causes significant environmental damage?82,000 acres of 14.4Energy policy ?Public policy can cause major improvements in energy use? 1973 to 1995: 18% less energy growth with $150 billion in savings? The Energy Policy Act of 2005 intended to establish U.S. energy policies? Changed Congressional leadership led to the Energy Independence and Security Act of 2007?What are （1）Security threats: oil dependence ?In 2007, the U.S. imported $300 billion of oil?35% of our balance-of-trade deficit?The global oil market is beyond our control?We invest heavily in stabilizing the persian Gulf region,where 61%world proved reserve are found shocks?A 5% decrease in supplies causes increased prices, inflation, decrea ①Security threats: terrorism ②Security threats: global climate change ?Using fossil fuels threatens economic, environmental,and national security?Burning fossil fuels releases CO2?Coal produces the most greenhouse gas emissions? Natural gas produces the least?Increasing carbon dioxide increases global temperatures?Melting ice caps and raising sea levels?Causing more 我没有足够的钱 remind youself college participation rates of males 18-to 24 years old by parental income. Mutations in a proto-oncogenes are dominant mutations (gain of function) e.g. c-myc 2009年，我被华东师范大学录取，并选择了自己喜欢的化学专业
