If we go scientifically, we won't be able to eat anything and use anything. For everything, there is adverse effects. So, its very difficult to survive avoiding all these instruments in this modern & sophisticated era. That's why .... don't care .. just use it .... its not only you who is using, but u can count in billions users. We all are blessed by god and our death is fixed to certain date. So dear .... be cool and use microwave .. its really good and saves much time.