How green is it to paint all the crosswalks green?

It's a new fad. In White Rock, I saw pavement painted red.

In Vancouver, the preferred colour is green, but this doesn't seem a very "green" idea to me.

Every few months it wears off and has to be repainted.

I can't help wondering what chemicals go into the storm drains as the paint washes away.

And I also wonder what this is costing the city and who supplies the paint and the labour.

After all these years of making do with white and yellow street markings, why do we suddenly need wide swathes of green for the crosswalks? We already knew where they were.