Jawapan

2016-10-10T23:39:43+08:00
As electroplating , refining metal and producing chemicals
1 1 1
2016-10-10T23:40:51+08:00
-production of oxygen for spacecraft & nuclear submarines
- production of hydrogen for fuel, using a cheap source of electrical energy
-in cleaning and preservation of old artifacts
*not sure if the answer is 100% correct be tolerant ya