Higher milk prices mean customers are paying more at Amy Green's ice cream shop in downtown Lincoln, Neb.

NPR: Milk Costs Surge Due to Corn

"You realize the name of the game is to escape pollution and live near a green space, " said Amy Wood, an American ex-pat who has been living in Asia for seven years.

BBC: Living in: Hong Kong

"The more you can take public transportation, the better off the environment is, " said Amy Spatrisano, president of the Green Meeting Industry Council.

CNN: Take green tactics on the road

The letter is signed by a host of high profile artists from across the musical spectrum: Katie Perry, Sheryl Crow, Rihanna, Pink Floyd, Blondie, Bill Joel, Amy Grant, Megadeth, CeeLo Green, Ted Nugent and the Dead Kennedys.

FORBES: Musicians Oppose Bill To Cut Royalties Paid By Pandora