If you conserve or save scarce resources they will no longer be as scarce as before and more of those scarce resources will be available. Conservation can even make the scarcity of a resource nonexistent, meaning the resource is now plentiful or enough.
4 buttons can be sewn on each shirt
Never
If safe turn the power connection off at the supply source e.g the power box where the main switches are. But do not attempt to turn the power off st the powerpoint switch (the source in which the electrical hazard is coming from).
Even after the power has been disconnected you shouldnt touch the person immediately after.