Costs
I took a course and the one thing the teacher said to take from the class is "There is no such thing as a free lunch." This was a data class and the example was higher speed = more errors per second.
I think about this when I read about ZERO EMISSIONS CARS. Where does the power come from to recharge the batteries? What are the windmills made of? How do we refine the metal to build them? Where will we put them? Who pays for the land? Who wants the farms in their back yard?
Don't get me wrong every little bit helps but nothing is perfert.
Remember everything has a cost.
Nuclear?
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