On arrival back from greener-than-thou Portland, it was a treat to see, immediately on exit from the international terminal at YVR, the new green wall on the parking garage:

YVR Greenwall

Or is it related to the Canada Line? 

I suppose it’s a statement of sustainability (though it’s not clear to me exactly what a green wall does).  Maybe it’s more public art – a living quilt.

Green wall detail