the closest thing we’ve ever had to an environmental anthem since Joanie's tune?
Nah, one quickly comes to mind;
Neil's "Oh Mother Earth" (Ragged Glory 1990) organ, harmonica, wonderful.

http://www.youtube.com/watch?v=06pWeEXr9fg&feature=PlayList&p=F4765B8EA1C198CA&playnext_from=PL&playnext=1&index=7

Oh, Mother Earth,
With your fields of green
Once more laid down
by the hungry hand
How long can you
give and not receive
And feed this world
ruled by greed
And feed this world
ruled by greed.

Oh, ball of fire
In the summer sky
Your healing light,
your parade of days
Are they betrayed
by the men of power
Who hold this world
in their changing hands
They hold the world
in their changing hands.

Oh, freedom land
Can you let this go
Down to the streets
where the numbers grow
Respect Mother Earth
and her giving ways
Or trade away
our children's days
Or trade away
our children's days.

Respect Mother Earth
and her giving ways
Or trade away
our children's days.