ナショナルジオグラフィックのインスタグラム(natgeo) - 7月12日 07時26分

Photo @pedromcbride (Pete McBride). When I made this image of Hoover Dam, the water level on America’s largest reservoir — Lake Mead — was low. Now it is record low — just 39% full. This week, the giant Colorado River Reservoir which stores water for Las Vegas, much of Arizona and all southern California, hit its lowest level since the 735-foot-high Hoover dam was built in 1935. #Drought, changing moisture patterns, population growth and management practices are all playing a role. To see a video chronicling the Colorado River source to sea and its current challenges go to @pedromcbride. #changethecourse #raisetheriver #aerial #arid @thephotosocity

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