Thursday, October 2nd, 2014 - 8:26 am 
(Arizona time)
Humans have long sought to control power as well as energy. For those that lived near lakes and streams, the advantages of transport by flotation must have been perceived early.

Before and during the Middle Ages, the geared water mill spread from Rome throughout western Europe. The watermill was used to grind grain, saw wood and marble, and for turning grindstones. The scarcity of slaves and the value of draft animals for other uses may have accelerated its acceptance. These watermills formed the power base for civilization prior to the Industrial Revolution.

But the power produced by these mills could not be transported - it had to be used at the mill site. Not until electricity could be generated practically from falling water could this barrier to water power be broken, and by then most of the industrial world had converted to steam power.

Still, the world's first hydroelectric power plant built at Godalming, England, in 1881 signaled a new era in power and energy. This renewable technology quickly took hold and spread throughout the world. Hydroelectric power was scarcely 20 years old when Arizona began to look to it as a means to turn the desert into an oasis.

More on hydropower here.

AzSC Blog

There’s a lot of work (to do)...

Earlier this summer the Environmental Protection Agency (EPA) released its proposed rules for Section 111(d) of the Clean Air Act. This is the rule that deals with reducing carbon emissions from existing power plants by 2030. The proposed rule was shaped by public input and builds upon existing priorities, activities, and efforts in states throughout the country.

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