Country singer-songwriter Rosanne Cash says she's no crusader, just a citizen with a conscience.

She speaks out on freedom of expression, environmental concerns and the importance of music education in schools, among other causes.Her songs have addressed domestic violence and child abuse.

"It sounds like all I do is this stuff. But I just try to think about it in terms of what pushes my button, what feels right to me, what seems the most important," she said.

"The truth is, my environmental work is an extension of mothering. It's knowing that I'm going to have grandchildren on this planet who may not have clean air and clean water."

Cash, the daughter of Johnny Cash, is married to singer-songwriter Rodney Crowell and has three daughters and a stepdaughter.