Birmingham now has 58 hydroponics shops , up from 42 just a year ago .
伯明翰现在有58家水栽培商店，而一年前只有42家。
Although this is urban hydroponics , not vertical farming , it is a step in the right direction , says mr head .
海德表示，虽然这只是城市水培温室农场，算不上垂直农场的实现，但这仍是往正确目标走出的一步。
Most important , hydroponics allows the grower to select where to locate the business , without concern for outdoor environmental conditions such as soil , precipitation or temperature profiles .
最重要的是，种植者可以自由选择水培生产场所而不需要考虑室外环境条件，诸如土壤、降水或温度等。
There are a number of ways to do it , but essentially hydroponics involves suspending plants in a medium-such as gravel , wool or a form of volcanic glass known as perlite-while the roots are immersed in a solution of nutrient-rich water .
