Some lyrics from "Big Yellow Taxi" by Joni Mitchell.

"They took all the trees

Put'em in a tree museum

And they charge the people

A dollar and a half just to see 'em.

Don't it always seem to go

That you don't know what you've got

Till it's gone

Hey farmer farmer

Put away that DDT now

Give me spots on my apples

But leave the birds and the bees

Please!

Don't it always seem to go

That you don't what you've got

Till it's gone."

Do you get the message for RGGI?  Once its gone, its gone.