Environmentalism, conservation, and more.

Different Drummer: Leonard Cohen

Leonard Cohen - "The Future"

10,000 Maniacs - "Poison in the Well"

Reverend Moon - "Old Graves"

Moonwood - "Drawing Water from a Poisoned Well"

Yes - "The Ancient - Giants Under the Sun"

Graham Parker - "Green Monkeys"

The Fall - "Van Plague?"

Wu-Tang Clan - "America"

Macklemore & Ryan Lewis - "Same Love" featuring Mary Lambert

Melissa Etheridge - "Silent Legacy"

Leonard Cohen - "Everybody Knows"

Leonard Cohen - "Democracy"

Grand Funk Railroad - "Creepin'"

Dead Kennedys - "Soup is Good Food"

XTC - "Scarecrow People"

Skinny Puppy - "Testure"

Holly Cole - "Fragile"

Tom Petty & The Heartbreakers - "Two Gunslingers"

The Mighty Mighty Bosstones - "Let's Face It"

Leonard Cohen - "Anthem"