500
-Water Shortages
-Rising sea levels (factors and impact)
-conservation
-The rate of water consumption is growing twice as fast as as the population growth rate. Freshwater shortages that result from this demand can be due to natural weather patterns that reduce rainfall, rivers changing course, flooding that contaminates existing supplies, competition for water, overgrazing and the resulting erosion, pollution of existing supplies, and competing interests that reduce water conservation programs
-thermal expansion of water and the melting of icecaps and glaciers
-Thermal expansion: ocean water expands as it warms
-Impacts: things melt, things die, ocean goes up, erosion of beaches and bluffs, salt intrusion into aquifers and surface waters, inundation of seawater into low-lying areas, increased flooding, storm damages
-Conservation:Changes in personal habits, construct dams and reservoirs, desalinate water, drip irrigation, education, encourage the use of recycled products that require less water to produce, engineer systems to collect more runoff, levy taxes or user fees, line irrigation channels and cover canals, meter all used water plant crops that do not require as much water and xeriscaping (reduces urban runoff), rebates or legislation of low-flush toilets, shower restrictors, reduce gov subsidies, reprocess (recycle) water, seed clouds, tiered price scale, use of icebergs, use more groundwater