setting several environment variables in the current shell process

Hi,

I am writing a perl script (environment.pl) which sets several 
environment variables which have to be applied to the current shell process.

I have set the values in the perl script using $ENV{'var1'} = "aaa" 
syntax. This would set the environment variables for the perl script 
process and the child process. But I want the environment variables to 
be accessible from the shell which invoked the perl script ( i.e. 
$./environment.pl).

In csh based scripts, I can use the 'source' keyword, or in 'sh' based 
scripts, I can use the '.' symbol. But what would be the equivalent in 
Perl ?

Please help. I have chosen to use Perl scripting language instead of 
Shell scripting as the script has to be shell type independant.


Thanks & Regards,
Gaurav Arora,
Texas Instruments,
India.