欧美黑人3p-欧美黑大硬粗免费视频-欧美黑大粗-欧美黑粗特黄午夜大片-欧美黑白配性xxxxx-欧美黑b

INSTALLING ECO-FRIENDLY CAR BRAKES HELPS IMPROVE WATER QUALITY

 If you had your car brakes replaced recently, there's a good chance you helped improve water quality without even knowing it. A California law that requires environmentally friendly brake pads is being phased in through the year 2025, but many brake companies are already complying voluntarily.

This good news for Bay Area waterways began in the early 1990s with a mystery. "Parts of the bay couldn't even be fished. The fish were so full of copper that they were not fit for human consumption," Mountain View auto shop owner Larry Moore said.

No one was sure where the copper was coming from. Moore said researchers looked at everything from rain gutters to rat poison until a group of auto mechanics helped connect the dots. Brake pad manufacturers keep their formulas secret, but mechanics installing the pads could see the copper and that turned out to be the clue that counted.

Meredith Williams with the California Department of Toxics Substances Control explained "Every time we brake, a little bit of dust is generated from our brake pad, so whatever is in the brake pad ends up on our roads." That brake dust is full of copper. Rain washes it down storm drains, then it flows into creeks and out to the bay. "Getting that copper out of our water is really important. Copper is a toxic to aquatic species from the bottom of the food chain, like zooplankton, through minnows and trout and even salmon," Williams said.

Storm water treatment agencies, environmental groups and brake companies teamed up to research the problem in the Bay Area. The research eventually led to laws passed in 2010 in California and Washington State, phasing out copper and other heavy metals from brake pads over 15 years.

Some manufacturers are not waiting around. "40 percent of the brakes on the market comply with the goals that were set for the year 2025," Williams said.

Manufacturers were allowed to keep selling their old supply of brake pads, but were required to start making new ones with almost no asbestos, cadmium, chromium, lead or mercury by 2014. By 2021, they must make pads with less than 5 percent copper, and by 2025, less than .5 percent.

Larry's AutoWorks in Mountain View has been installing the new pads for more than five years. Moore said brakes that comply with the requirements are available for almost all cars now. They cost about the same and perform well.

Up until now, compliance by the manufacturers has been essentially voluntary, with no penalties in place. But California is now working on rules that will make the low copper requirements mandatory, with details about how the law will be enforced.

Individual drivers are not required to take any action, but Williams said they can help speed things up. "It certainly wouldn't hurt if more people were aware and more people asked their mechanics for these kinds of brakes," she said.

Many mechanics may not know about the new pads yet, but they can ask for them from their distributor. The industry has agreed on a set of symbols to make compliance with the new standards more clear.

The Environmental Protection Agency estimates California's urban runoff is down as much as 61 percent due to changes in brake pad composition.
2016-09-12 22:28:09
主站蜘蛛池模板: 亚洲精品免播放器在线观看 | 成人黄色三级 | 看一级毛片国产一级毛片 | 久久国产精品亚洲综合 | 毛片国产精品完整版 | 求网址你懂的手机在线观看网站 | 最近中文字幕网2019 | 精品综合久久久久久8888 | 国产一级视频免费 | 久久精品一级 | 天天天做天天天天爱天天想 | 亚洲精品一区久久狠狠欧美 | 交 视频 在线 观看 交视频在线观看国产网站 交性视频免费看 | 日本一区二区三区免费看 | 免费一级毛片不卡在线播放 | 99综合在线 | 亚洲一区在线视频观看 | 欧美色乱 | 中国一级淫片aaa毛片毛片 | 日韩一区二区在线观看 | 国产身材极品喷水 在线播放 | 日韩 亚洲 中文 图片 小说 | 黄色美女网站在线观看 | 亚洲欧美日产综合一区二区三区 | 久久中文字幕久久久久 | 免费综合网 | 日本高清免费在线观看 | 免费韩国美女爽快一级毛片 | 亚洲最新在线观看 | 欧美 日韩 国产 在线 | 韩国一级特黄清高免费大片 | 毛片网在线| 久久精品大全 | 2021国产成人精品国产 | 国产91成人 | 日本欧美综合免费视频 | 日本天堂视频在线观看 | 国产一级特黄aa大片软件 | 精品欧美一区二区三区 | 97国产成人精品免费视频 | 亚洲一区二区三区高清 不卡 |