Say hi to the Googlers with the gardening tools

So, I was just playing around with Google’s new street side photos. Hmmm, sounds like something that Microsoft did more than a year ago back when I worked there. But, go to Google’s headquarters in Mountain View and you’ll see a bunch of people standing outside. I wonder who they are? Why are they holding shovels and rakes and other gardening tools? Why are they all wearing green shirts? What do those shirts say? What team do they belong to? So many questions.