Left 4 Dead buses begin to roll around LA.

I've been doing my bus / bike ride to work everyday since June. According the this site, I'm on track to save about 4.5 tons of carbon emissions this year.

But enough smug gloating. My bus riding has a different story to tell today. Yesterday I noticed several busses driving around covered with Left 4 Dead Ads.

In fact the bus I eventually climbed on had one, but it was too dark to get a good pic of it by then. I'm going to try again tonight, but until then, here's my cell phone pic of the one I saw yesterday: