Just to be clear, you don't have to dress (or act) like this
nor live like this
to be environmentally savvy/green.
You don't have to be nut job. Just make a conscious effort to continually do a little better: turn off lights when you leave a room. Walk to that friend's house instead of drive. Recycle your office paper and pop cans instead of throwing them away.
A few small steps in the right direction can make a lot of difference. So don't be afraid to take upon you the title of "green".
Remember Bob, and just take baby steps.