Aug. 9, 1593: Izaak Walton, author of "The Compleat Angler," the first known book in praise of fishing, is born in England.

Aug. 9, 1916: Lassen Volcanoes National Park (at right) is established. The northern California site includes mudpots, geysers and hot springs associated with active volcanic peaks.

Aug. 9, 2005: Author-historian Charles Mann publishes "1491: New Revelations of the Americas Before Columbus." The author gives unprecedented detail to what natural life was like on two continents with a relatively sparse human population.

Aug. 9, 2012:  Almost 50 years after the U.S. began spraying the defoliant chemical Agent Orange in Vietnam, the two countries began a $43 million joint project to clean up a storage depot near the former U.S. airbase at Da Nang.  Agent Orange has been linked to multiple health problems.

Photo: exquisitur/Flickr

This feature is compiled by Peter Dykstra, an MNN contributor and publisher of Environmental Health News and The Daily Climate.