You don't have to create a new shell in the script that changes the environment: 
# File foo.pl:
$ENV{FOO} = 'bar';
exec 'perl', 'bar.pl';

# File bar.pl:
print $ENV{FOO}, $/;

# launch it:
$ perl foo.pl
bar

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In reply to Re^5: new shell - perl by moritz
in thread new shell - perl by opensourcer

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