[arch-general] How to suppress the list of variables that are output at shell login?

Hi, Whenever I login in zsh using an `su -l user` command, I get the following list of variables outputted on the shell HOME=/home/user LOGNAME=user PATH=/usr/bin:/usr/local/bin:/bin:/usr/local/sbin:/usr/sbin:/sbin:/usr/share/backuppc/bin SHELL=/bin/zsh TERM=xterm USER=user How can I suppress this message? -- Jayesh