Songs about ecology


I was going to make a collection of ecology songs and need some help. So far I have Mercy Mercy by Marvin Gaye and cover by Robert Palmer. Big Yello Taxi by Joni Mitchell and Natures way by Spirit. Any help appreciated.
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The Guess Who ,the song .... New Mother Nature . Ten Years After ,the song.... I'd love to Change the World (classic!).
Check out Bruce Cockburn(Canadian). He's got a bunch, going back to 1970, but "If a tree falls" comes to mind.

...or even "we work the black seem" by Sting.
Try
James Taylor -- Gaia -- from the Hourglass album.
Dire Straits -- Telegraph Road -- from Love Over Gold
and, from the same album,
Industral Disease.

ATB,

Joe