Fox News reports that the state of Washington is looking to put an end to its copper pollution problem by cutting down the acceptable amount of the metallic element in brakes sold in the state to just five percent by 2021. Currently, copper levels can be 25 percent or more. Copper will be eliminated altogether by 2023 if OEMs and brake suppliers can figure out a way to make that happen. Automakers and suppliers have used copper in brakes since asbestos was smartly banned from our stoppers back in the early 1990s.
So why concentrate on automakers to cut down on copper pollution? Non-profit Sustainable Conservation claims 530,000 pounds of copper pollution enters San Francisco Bay per year, and one third of that number could come from brake pads. Washington ecologists reportedly agree with the one-third figure as well, stating that 70,000 to 318,000 pounds of copper enter Puget Sound each year. The remaining sources of copper pollution include copper pipes, building materials and paint.
While adding a couple dozen tons of copper to our waterways sounds anything but good, researchers reportedly haven't come up with any widespread issues caused by man-made copper runoff. But government scientists claim that even low levels of copper can, for example, throw off the sense of smell of salmon, inhibiting the large fish's ability to escape predators. Copper is also toxic to plankton, an essential food source for many fish.
[Source: FOX News]