科普 | 用英文解释 VOCs
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VOCs（挥发性有机化合物）是一种容易在室温下挥发的碳化合物。在我们的日常生活中，成千上万种不同的VOCs被生产和使用，它们无处不在。
VOCs or Volatile Organic Compounds are a large group of carbon-based chemicals that easily evaporate at room temperature. There are thousands of different VOCs produced and used in our daily lives and they are everywhere.
在这个视频中，我们将主要介绍人为源VOCs，比如地毯、油漆、涂料、化妆品、清洁剂、空气清新剂、粘合剂和汽油等等。这些人为源VOCs会导致温室气体的产生。
In this video, we are going to focus on man-made VOCs: carpets, paints, coatings, cosmetics, cleaning chemicals, air fresheners, adhesives and gasoline to just name a few. These types of man-made VOCs contribute to greenhouse gases.
虽然大多数人可以闻到高浓度的VOCs，但有些VOCs却不一定有气味。这一点非常重要。气味并不能表示吸入这些化学物质的风险程度，因为你闻不到它并不意味着没有VOCs的存在。
While most people can smell high levels of VOCs, other VOCs have no odor. This is very important. Odor does not indicate the level of risk from inhalation of this group of chemicals. Just because you can't smell it doesn't mean there aren't any VOCs present.
VOCs对人体健康造成的危害取决于VOCs的含量、暴露时长以及暴露频次。
The risk of health effects from inhaling any chemical depends on the content level of VOCs, how long you are exposed to them and how often you are exposed to them.
为了减少暴露在这些有毒物质中，应寻找VOCs含量最少的产品并远离美国加州65号提案中提到的化学物质，它们会导致癌症，先天缺陷和生殖问题。您可以很容易通过查看产品的SDS（安全技术说明书）找到这些重要的信息。
To reduce exposure to these toxins, always look for products that contain the lowest amount of VOCs and stay away from chemicals on the Prop 65 List. They are known to cause the cancer, birth defects and reproductive problems. You can easily find this important information by requesting to see in the approved SDS from the product researching.
在加拿大和美国的国家规定中，对于混凝土密封固化剂的VOCs含量限值为400 g/L。加州对于混凝土密封固化剂的VOCs含量限制为全球最严，每升混凝土密封固化剂最多可含100g VOCs，比加拿大和美国的国家规定低4倍，因此，您应该感谢他们。
The national VOC regulations for concrete sealers in Canada and US allow a maximum 400 grams of VOCs per liter. California is leading the planet with the VOC regulations and you should thank them. Their regulations allow a maximum of 100 grams of VOCs per liter. That's 4 times lower than the national regulations in both Canada and US.
原始视频链接：
http://thecementstore.com/videos
撰稿：谷原
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