The Pepsi Refresh contest so far has awarded $20 million in grants for creative charitable ideas. Casey Rodgers/AP hide caption

itoggle caption Casey Rodgers/AP

Antionette Levi solicits donations for the Salvation Army Dec. 21 in Chicago. As the season winds down, donations to Chicago-area kettles have been over 10 percent shy of those received last year, but the organization hopes to match last year's record total of $139 million. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images

Lisa Tumbarello, a stylist trained by Stacy London from TLC's What Not to Wear, encourages customer Tom Spinelli to buy some ties at a Goodwill trunk show at Caramel, a boutique in Washington, D.C. Abby Verbosky/NPR hide caption

itoggle caption Abby Verbosky/NPR

Before evacuating from Katrina, Bobbie Jennings (right) lived next door to her twin sister, Gloria Williams, in the public housing that existed on the same site as Harmony Oaks in New Orleans. While Jennings likes the actual apartment, she says she is unhappy with the new development because the new apartments do not provide the same sense of community as before. Katie Hayes/NPR hide caption

itoggle caption Katie Hayes/NPR

The slogan "Trenton Makes, The World Takes" spans the Lower Trenton Bridge above the Delaware River. Author Janet Evanovich grew up in South River, N.J., and chose to set her best-selling thriller in the neighborhoods of Trenton. Mel Evans/AP hide caption

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Alex Williamson, 8, is one of 17 million children who live in U.S. households where getting enough food is a challenge. Sometimes it's hard for the poor to eat healthy because it costs more. Pam Fessler/NPR hide caption

itoggle caption Pam Fessler/NPR

Volunteers sorted through food last fall as they stocked shelves at the San Francisco Food Bank in California. As the U.S. continues to struggle through the recession and unemployment is at record highs, food banks are seeing an increased demand. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

Nga Thi Buscall, 60, slept on the streets of Washington, D.C., last winter. New numbers from the Department of Housing and Urban Development show that the number of homeless people actually dipped last year -- although more families were living on the street. Jacquelyn Martin/AP hide caption

itoggle caption Jacquelyn Martin/AP