"Oh Mother Earth" by Neil Young, album: Raged Glory (1990)

Oh, Mother Earth,
With your fields of green
Once more laid down
by the hungry hand
How long can you
give and not receive
And feed this world
ruled by greed
And feed this world
ruled by greed.

Oh, ball of fire
In the summer sky
Your healing light,
your parade of days
Are they betrayed
by the men of power
Who hold this world
in their changing hands
They hold the world
in their changing hands.

Oh, freedom land
Can you let this go
Down to the streets
where the numbers grow
Respect Mother Earth
and her healing ways
Or trade away
our children's days
Or trade away
our children's days.

Respect Mother Earth
and her healing ways
Or trade away
our children's days.

A call to respect Mother Earth for her beauty, her offerings and for future generations survival and welfare

Neil Young is an outspoken advocate for environmental issues and small farmers, having co-founded in 1985 the benefit concert Farm Aid. We read in wikipedia about his environmental activities and against global poverty:

Farm Aid was organized by Willie Nelson, John Mellencamp and Neil Young, spurred on by Bob Dylan's comments at Live Aid earlier in that year. (Dylan said, "I hope that some of the money...maybe they can just take a little bit of it, maybe...one or two million, maybe...and use it, say, to pay the mortgages on some of the farms and, the farmers here, owe to the banks....") Nelson and Mellencamp then brought family farmers before Congress to testify about the state of family farming in America. Congress subsequently passed the Agricultural Credit Act of 1987 to help save family farms from foreclosure.

Today, Farm Aid is an organization that works to increase awareness of the importance of family farms, and puts on an annual concert of country, blues and rock music with a variety of stars. Young's speeches about the environment are a highlight of the annual shows.

Also in wikipedia:

Neil Young, after Buffalo Springfield, solo or together with Crosby, Stills & Nash, used to write lyrics about social issues, like Ohio, Southern Man and Alabama, but also about environmental issues.

You can hear Mother Earth in youtube here and here