Award-winning Maine author and journalist Colin Woodard will speak Wednesday at Portland Public Library about the threats facing waters throughout the world, including the Gulf of Maine.

The talk, called “Ocean’s End: The Crisis in the World’s Seas and the Gulf of Maine,” is at 6 p.m. Wednesday in the library’s Rines Auditorium and is the keynote address of the library’s Sustainability Series.

Colin Woodard Press Herald file/Gordon Chibroski

Woodard, who lives in Freeport and covers state and national affairs for the Portland Press Herald/Maine Sunday Telegram, was a finalist for the Pulitzer Prize for explanatory reporting in 2016 for a series on the effect of climate change on the Gulf of Maine. He also wrote a book in 2001 called “Ocean’s End: Travels Through Endangered Seas.”