Yes
you dont.
Yes, it will :)
Yes, it does for when your phone is off, it saves electricity which was transferred to it by charging and when electricity is saved, money is saved too.
Yes.
it is not recommended to use your cell phone when charging, this could cause the circuits to short. Ideally you should charge your battery when your phone is turned off
A cell phone charging pad is a device that allows you to charge your cell phone wirelessly. All that you need to do is set your phone on top of the pad. The phone does not need to be plugged in for it to start charging. A cell phone charging pad is extremely convenient to use. All you have to do is set your phone on top of it before you go to sleep, and you will never have to worry about your phone going dead again. The ease and comfort of using a cell phone charging pad makes it a great investment.
No. It is no different than texting or browsing the internet while your phone is charging.
in my opinion no
Yes, any electrical device gives off electromagnetic radiation. Will it harm you? Probably not, unless your phone is in close proximity to your body, like sitting in your lap. Even then it is still being debated. But you probably shouldn't put any electrical device like a cell phone on your lap while it is charging anyways.
maybe...
No problem at all.
Yes, there are very many solar cell phone that are readily available.