Sentences with phrase «by phosphorus pollution»

Over 60 % of American coastal rivers and bays have been negatively impacted by phosphorus pollution, and there are currently at least 166 coastal «dead zones» in the United States.

Not exact matches

«What surprised us the most was how the impact of nonweather factors, such as nitrogen and phosphorus pollution, varied strongly by season, while weather factors remained consistently important throughout the year,» he said.

«We also found that most palms do not need any phosphorus in their fertilizer to be healthy, and by not applying this element, we can eliminate one possible source of water pollution in Florida,» said Broschat, a faculty member at UF's Fort Lauderdale Research and Education Center.

Phosphorus pollution causing algal blooms in Lake Erie alone has reduced the lake's tourism value by $ 4 billion; shoreline properties by another $ 700 million.

But pollution also covers hundreds of chemicals which are fine or even beneficial at low levels but which if released in large quantities or in problematic circumstances cause «harm» — like phosphorus (grows your veges but also leads to toxic cyanobacterial blooms which kill cattle), nitrogen (grows crops kills many native species of plants and promotes weed growth costing farmers), copper (used as an oxygen carrier by gastropods but in high concentrations kills the life in sediments which feed fish), hormones like oestrogen (essential for regulating bodies but in high concentrations confuse reproductive cycles especially with marine life) or maybe molasses from a sugar mill (good for rum but when dumped into east coast estuaries used to cause oxygen sag in estuaries leading to massive fish kills).