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Last updated on April 16, 2014 at 4:54 EDT

Latest Hans Paerl Stories

2009-05-18 10:34:31

A U.S. scientist urges that equal attention be given to phosphorus and nitrogen produced by human activity that are degrading water quality and aquatic life. University of North Carolina at Chapel Hill Professor Hans Paerl notes the priority has historically been given to controlling phosphorus. But Paerl argues nitrogen imbalance is equally damaging and a dual nutrient strategy is necessary to manage the problem effectively. The combination of human population growth, urbanization and...

2009-05-18 10:43:42

New study argues need for dual nutrient strategy to improve aquatic ecosystemsExcess phosphorus and nitrogen produced by human activities on neighboring land is making its way into our coastal waters and degrading both water quality and aquatic life. Although historically the priority has been to control phosphorus, Professor Hans Paerl, from the University of North Carolina in the US, argues that nitrogen imbalance is equally damaging. He adds that a dual nutrient strategy "“ tackling...

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2008-04-04 12:00:00

Add this menace to the list of looming environmental disasters blamed on climate change: more pond scum. The blue-green algae that coats stagnant ponds and blooms in water reservoirs in hot summer months will thrive in a changing climate, said Hans Paerl of the UNC-Chapel Hill Institute of Marine Sciences. And more pond scum could trigger more sickness. The 40 to 50 harmful species of the blue-green algae have been linked to digestive, neurological and liver diseases in humans. Municipal...