Delivering a blend of local history, environmental issues, education, entertainment, and fresh air, Davenport's River Action is again presenting a series of outdoor presentations in the final month of the annual Channel Cat Talks and Riverine Walks: weekly programs that, from August 3 through September 1, will address such topics as improvements to the Lock & Dam 15, green rooftops, the area's German-American heritage, and jazz masters Bix Beiderbecke and Louie Bellson.