01.06.2013 Views

Image of the Day

Image of the Day

Image of the Day

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Petersen said that option is complicated by <strong>the</strong> fact <strong>the</strong> drought has left<br />

four <strong>of</strong> those lakes too low for additional water removal.<br />

Water Quality Water Pollution<br />

Industrial agriculture is among <strong>the</strong> leading causes <strong>of</strong> water pollution<br />

in <strong>the</strong> United States today. In <strong>the</strong> 2000 National Water Quality Inventory<br />

conducted by <strong>the</strong> Environmental Protection Agency (EPA), agricultural<br />

activity was identified as a source <strong>of</strong> pollution for 48% <strong>of</strong> stream and river<br />

water, Fand for 41% <strong>of</strong> lake water.<br />

Water pollution from industrial farms not only damages <strong>the</strong><br />

environment and kills wildlife, but it can also sicken and kill people. And<br />

since <strong>the</strong>se farms exercise little restraint when it comes to water usage,<br />

<strong>the</strong>y tend to waste large quantities <strong>of</strong> water, even when neighboring<br />

communities are experiencing water shortages. Because small, sustainable<br />

farms are more integrated with <strong>the</strong>ir surrounding communities, <strong>the</strong>y pay<br />

closer attention to <strong>the</strong> ways that <strong>the</strong>y use water and how <strong>the</strong>ir practices<br />

affect local water supplies.<br />

Sources <strong>of</strong> Pollutants<br />

Most water pollution from industrial farms results from <strong>the</strong> storage<br />

and disposal <strong>of</strong> animal waste. Industrial livestock farms store manure and<br />

o<strong>the</strong>r farm wastes in gigantic tanks known as “lagoons” which can hold<br />

millions <strong>of</strong> gallons <strong>of</strong> manure and urine. Unfortunately, <strong>the</strong>se lagoons<br />

<strong>of</strong>ten leak and—during large storms—<strong>the</strong>y may rupture or simply<br />

overflow. When this happens, <strong>the</strong> environmental damage can be<br />

devastating, as raw manure is up to 160 times more toxic than raw<br />

municipal sewage. FLeaking lagoons also release antibiotic residues and<br />

harmful bacteria that can leach into water supplies.<br />

In order to dispose <strong>of</strong> manure after it’s been stored in lagoons,<br />

industrial farms spray <strong>the</strong> waste onto farm fields as fertilizer.<br />

Unfortunately, <strong>the</strong>se farms produce far more waste than can be applied to<br />

fields, and once <strong>the</strong> saturation point has been reached, <strong>the</strong> waste runs <strong>of</strong>f<br />

into nearby water systems. The most common form <strong>of</strong> water pollution in<br />

<strong>the</strong> United States is excess levels <strong>of</strong> nitrogen or phosphorous, both <strong>of</strong><br />

which are largely caused by fertilizer run<strong>of</strong>f. FWhen manure is spread on

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!