“Before the Flood,” a documentary exploring the effect of global warming, will be presented at Southern Oregon Climate Action Now's general meeting set for 6 to 8 p.m. Tuesday, March 28, at the Medford library, 205 S. Central Ave., Medford. The program is free and open to the public. "Titanic" star Leonardo DiCaprio, designated as a United Nations messenger for peace with a focus on climate change in 2014, teamed with Director Fisher Stevens to produce the film chronicling his travels to explore the effect of global warming and climate change and his efforts to stimulate meaningful international action. For more information, visit http://socaninfo.