I think back to a song from the group Spirit that was released in 1968: "It's Nature's Way of Telling You".
Check it out: http://www.youtube.com/watch?v=YsTK2LHZKPQ
Unfortunately, singing along with the lyrics of the 1968 song, it is not difficult to see that 40+ years later and many billions of people later and much, much pollution and wars later ... that there really is SOMETHING'S WRONG ...
Another environmental song on the 1968 album is called "Fresh Garbage" and refers to ... yes. trash and pollution.
Check it out: http://www.youtube.com/watch?v=j2lE_DAGxM4
Pura Vida, Dr. Paulo