Many employers are unable to express any opinion about 'which' local schools prepare 'they' students best of about 'what' changes 'they' would make in educational programs.
If one lives a 'disorganized', 'pollution', crime-ridden world, 'one's' energies will be 'directed' at simple survival.
Silver, one of the first 'metal' used by 'humans' is an 'excellent' conductor of heat and 'electricity'.