Z is for - Zero Percent

I sure hope that they are covering Zymurgy, which we all know is  The branch of chemistry that deals with fermentation processes. 
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y - is for yeast

While a lot of the credit is often attributed to the hop variety, the spectrum of flavours and scents that the yeast is responsible for is truly mind-boggling. 
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x - is for xollaboration

An x in the wonderful world of brewing, as it does in many forms of art or business, signifies a collaborative effort between two or more people, artists or businesses.
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w - is for Water

It takes around ten pints of water to make a pint of beer and, because beer is a stonking 90-95% water, the water that you use is going to affect the taste, big time.
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