So why don 't we desalinate more to alleviate shortages and growing water conflicts ?
因此，为什么我们不通过淡化更多的海水来缓解用水短缺和因用水发生的冲突？
Energy and the technology to desalinate water are both expensive , and this means that desalinating water can be pretty costly .
能源和海水淡化技术都是非常昂贵的，这意味着淡化海水将是费用昂贵的技术途径。
To make fresh water , more cities are burning fuel to desalinate seawater , but that helps push up the price of oil .
为了制造淡水，更多的城市正在消耗燃料以淡化海水，但这会推高石油价格。
So a nanotube membrane that allows both sodium and chloride ions ( which are negatively charged ) to flow out of seawater could become a cheaper way to desalinate water .
