Question : Environment Variables

Can a Perl program access environment variables from inside the program?  What I’m kind of wondering is if a Perl script is activated, say from inside a UNIX shell, can it somehow ask for a variable that is somewhere in the host environment, say a variable that was created within that shell itself?  This needs to be done without passing the values in as variables to the shell script.  If it is possible how do I do it?

Answer : Environment Variables

Something like this:
$server = $ENV{MY_SERVER_VARIABLE};