Most deep-sea faunas rely for food on particulate matter, ultimately derived from photosynthesis, falling vent would dwarf any contribution from advection.

大多数深海动物依靠颗粒物质作为食物，这些颗粒物质最终来自于光和作用，下降的排放口会使平流的作用相形见绌。

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The Clean Air Act mandates the EPA to regulate harmful pollutants such as particulate matter and ozone.

《清洁空气法》授权美国环保局监管有害污染物，如微粒物质和臭氧。

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The 2005 AQG set for the first time a guideline value for particulate matter (PM).

2005年空气质量准则第一次为可吸入颗粒物（PM）确定了一项指导值。

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WMO scientists assess and monitor air pollutants such as ground-level ozone,smog, particulate matter, sulfur dioxide and carbon monoxide.

VOA: standard.2009.03.23

Ultrafine particulate matter refers to nanoscale particulate matter, smaller than 0.1 micron (100 nanometers) in size.

FORBES: Two New Reasons to Worry about Air Pollution: Obesity and Diabetes

It aims to establish a platform for exchange of knowledge with respect to methods for characterisation of colloidal and particulate matter in these systems and to cover the technological aspects of particulate matter in different water treatment processes such as drinking water, wastewater and landfill polluted waters.

UNESCO: Water Portal | Water Events Worldwide

While particulate matter emitted by vehicles make up a small part of overall particulate matter in China, in dense urban areas, it is almost certainly the highest contributor to human exposure of PM2.5, according to Vance Wagner, a senior researcher at the International Council on Clean Transportation.

WSJ: China's Pollution Fight Faces Resistance