we can use alternative energy sources so it can save electricity and we can also protect the environment against global warming risks.
using alternative energy isnt really effecient when mining because mining requires alot of power to be able to mine a coin succesfully . using alternative energy isnt also helpful to the environment because your mining hardware will still blow polution or excess waste whenever you run it .
Can the power saver system be used in all countries? Because in my country electricity is very expensive, if we start for minning there will be a lot of electricity.
I dont know if some mining hardware do have this feature but if your using a pc/laptop sure you can enabled it and you can now save electricity but your mining power will be affected . best solution to your problem is stop mining at all because you cannot earn sufficient income when your bills are too high .