Effective treatment of nitrogen containing wastewater is required to prevent eutrophication and groundwater pollution. This thesis shows that effective treatment may be combined with substantial nitrogen recovery in duckweed-based waste stabilization ponds.

Martin Evening is a professional photographer and digital imaging consultant, an experienced Photoshop user and key demo artist for Adobe. Based in London, UK, Martin was inducted into the legendary Photoshop Hall of Fame in 2008.
Leslie Alsheimer is an internationally published and award winning photographer, author, and photo-educator based in Santa Fe, New Mexico. She is the Founder and Director of the Santa Fe Digital Darkroom Photography Workshops & Tours, and an instructor with the Nikon Mentor Series, American Photo and Eddie Adams Workshops. Her documentary essays were recently awarded and published in National Geographic Traveler and PDN magazine's "World in Focus” competition and received two Honorable Mention LUCIE Awards at the 2008 International Photography Awards. Leslie can be found on the web at: lesliealsheimer.com and santafedigitaldarkroom.com