Did do you know that you can turn waste product in your kitchen or in your home to generate electricity you use for example some lime juice ,you extract the juice in it then you put it in a glass like you will need like 10 lime fruit ,then with a little salt.
Then you look for a zinc plate and a copper plate which you will you immersed in the glass containing the lime juice,then attached the copper wire to the zinc plates then test after you have heat the lime juice pour it on the glass and immersed it you will notice a flow of current in your tongue.then that's its.
