Looking for 20th century songs with similar meanings to 21st century songs
 

I have to choose ten of these 20th century songs and match each of them with a 21st century song that addresses similar environmental attitudes, values, themes or issues. I am having a tough time with it. Can anyone help me out?

The Eagles - The Last Resort
Neil Young - Pocahontas
Neil Young - After The Gold Rush
Buffy St. Marie - Now That The Buffalo's Gone
Joan Baez - What Have They Done To The Rain?
R.E.M - Orange Crush
R.E.M - Fall On Me
Joni Mitchell - Big Yellow Taxi
John Denver - Rocky Mountain High
Three Dog Night - Out In The Country
Red Hot Chili Peppers - The Righteous & The Wicked
Gordon Lightfoot - Too Late For Praying
Simon & Garfunkel - Sparrow
Jane's Addiction - Stop!
The Doors - When The Music's Over
The Yardbirds - Shapes Of Things