Don Hinrichsen, author of many books on the environment and development, including “Coastal Waters of the World,” “Our Common Future” and “The Atlas of the Environment,” will speak about the world’s coasts and oceans in crisis. Hinrichsen, who also has worked with United Nations agencies, governments and organizations in more than 60 developing countries, will speak at 6 p.m. today at the chapel of St. Paul Lutheran Church, 2136 N. Brady St., Davenport. For more information, call 563-326-3547.