Winrock International opens its new headquarters in Little Rock today. The charity says the three-point-five million dollar structure is filled with energy-efficient design elements. Winrock provides economic, agricultural and environmental aid in the United States and in other countries. Some neighbors around the building in the Riverdale area of Little Rock have complained about light, noise and the appearance of the new headquarters. Winrock says it is trying to address light and noise concerns. Winrock has reached an agreement for the University of Arkansas to use its facilities on Petit Jean Mountain near Morrilton.