Holding Polluters Accountable for Stormwater Runoff
When it rains in cities or suburban areas with lots of roads and rooftops, rainwater is unable to soak into the ground. Instead, it flows along the surface where it picks up pollutants like sediment, chemicals, oil, grease or heavy metals. The runoff then flows into storm drains where it ultimately ends up in nearby rivers, lakes and streams.
From basement backups to beach closures to sewage overflows, polluted runoff can have big costs for communities. The Federal Emergency Management Agency estimates that polluted urban runoff contributes to 25 percent of economic losses from flooding, totaling nearly $1 billion every year. The Environmental Protection Agency (EPA) has found that between 1.8 million and 3.5 million people are estimated to become sick from recreational contact with raw sewage discharges into waters every year.
In particular, large paved areas of commercial and industrial facilities built decades ago are significant contributors of polluted runoff yet are seldom required to control or treat it in ways that really protect our local waters. Taxpayer dollars already support public infrastructure to manage runoff and these existing sites are not doing their fair share.
Studies have consistently demonstrated that these sites accumulate large quantities of pollutants such as copper, lead, zinc, phosphorus and nitrogen. Although little management is required, runoff from these areas carries harmful contaminants into local waters that degrade drinking water supplies, cause beach closures and threaten fish habitat. Large volumes of runoff also contribute to local flooding, shutting down roads and exacerbating basement backups at additional costs to communities and local businesses.
Given that more than half of the hardened surfaces in our urban areas consist of buildings and parking lots (53.9 percent according to the U.S. Geological Survey), it will be practically impossible to attain clean water goals without controlling the runoff that leaves these sites.
Today, American Rivers, Anacostia Riverkeeper, Anacostia Watershed Society, Blue Water Baltimore/ Baltimore Harbor Waterkeeper, California Coastkeeper Alliance, Conservation Law Foundation, Natural Resources Defense Council, PennFuture, Potomac Riverkeeper and the Shenandoah Riverkeeper submitted petitions to the Environmental Protection Agency (EPA) that call on the Agency to use its existing authority to better manage runoff from existing commercial, industrial and institutional areas.
These petitions are based on facts we all know—that rainwater running off the pavement and rooftops in these areas pollutes our waters. They call on EPA to carry out the responsibility assigned to it by Congress in 1987, known as residual designation authority, to take steps that will create cleaner waters by reducing polluted runoff and keeping it out of storm sewers and local waterways.
These contributors should be held accountable for their contributions to pollution through runoff and help share the cost of managing their stormwater rather than placing the burden solely on the taxpayer. These sites can share in the cost of solutions to solve the problems they are helping create.
Visit EcoWatch’s WATER page for more related news on this topic.
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By Aaron W Hunter
A chance discovery of a beautifully preserved fossil in the desert landscape of Morocco has solved one of the great mysteries of biology and paleontology: how starfish evolved their arms.
The Pompeii of palaeontology. Aaron Hunter, Author provided<h2></h2><p>Although starfish might appear very robust animals, they are typically made up of lots of hard parts attached by ligaments and soft tissue which, upon death, quickly degrade. This means we rely on places like the Fezouata formations to provide snapshots of their evolution.</p><p>The starfish fossil record is patchy, especially at the critical time when many of these animal groups first appeared. Sorting out how each of the various types of ancient starfish relate to each other is like putting a puzzle together when many of the parts are missing.</p><h2>The Oldest Starfish</h2><p><em><a href="https://www.biorxiv.org/content/10.1101/216101v1.full.pdf" target="_blank" rel="noopener noreferrer">Cantabrigiaster</a></em> is the most primitive starfish-like animal to be discovered in the fossil record. It was discovered in 2003, but it has taken over 17 years to work out its true significance.</p><p>What makes <em>Cantabrigiaster</em> unique is that it lacks almost all the characteristics we find in brittle stars and starfish.</p><p>Starfish and brittle stars belong to the family Asterozoa. Their ancestors, the Somasteroids were especially fragile - before <em>Cantabrigiaster</em> we only had a handful of specimens. The celebrated Moroccan paleontologist Mohamed <a href="https://doi.org/10.1016/j.palaeo.2016.06.041" target="_blank" rel="noopener noreferrer">Ben Moula</a> and his local team was instrumental in discovering <a href="https://www.sciencedirect.com/science/article/abs/pii/S0031018216302334?via%3Dihub" target="_blank" rel="noopener noreferrer">these amazing fossils</a> near the town of Zagora, in Morocco.</p><h2>The Breakthrough</h2><p>Our breakthrough moment came when I compared the arms of <em>Cantabrigiaster</em> with those of modern sea lilles, filter feeders with long feathery arms that tend to be attached to the sea floor by a stem or stalk.</p><p>The striking similarity between these modern filter feeders and the ancient starfish led our team from the University of Cambridge and Harvard University to create a new analysis. We applied a biological model to the features of all the current early Asterozoa fossils in existence, along with a sample of their closest relatives.</p>
Cantabrigiaster is the most primitive starfish-like animal to be discovered in the fossil record. Aaron Hunter, Author provided<p>Our results demonstrate <em>Cantabrigiaster</em> is the most primitive of all the Asterozoa, and most likely evolved from ancient animals called crinoids that lived 250 million years before dinosaurs. The five arms of starfish are a relic left over from these ancestors. In the case of <em>Cantabrigiaster</em>, and its starfish descendants, it evolved by flipping upside-down so its arms are face down on the sediment to feed.</p><p>Although we sampled a relatively small numbers of those ancestors, one of the unexpected outcomes was it provided an idea of how they could be related to each other. Paleontologists studying echinoderms are often lost in detail as all the different groups are so radically different from each other, so it is hard to tell which evolved first.</p>
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