Suddenly affects. Not only human but even trees, Birds etc. For example vulture/crows which were common birds seen in rural areas (even urban areas) are rarely seen today. Production of coconut has also decreased a lot after mass use of mobile phones. We must find out an way to fight with it. My request to young generation is don't be addicted to mobiles/tabs etc. Use this only as per your requirement or else be ready to fight with Cancer soon (no pun intended. This is harsh truth)