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[Chemical Knowledge]：What are the upstream raw materials for PM? What are the downstream products?

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In the field of raw materials for chemical production, the upstream and downstream related products of PM (particulate matter) are quite abundant. The following are some of the upstream and downstream products related to PM:

1. Upstream products:

(1) Ore: Many chemical production requires the extraction of raw materials from ore, and the mining and processing of ore may produce PM. For example, large amounts of dust and particulate matter are generated during the mining and processing of iron ore.

(2) Coal: As an important energy and chemical raw material, coal may produce a large amount of PM in the process of mining, washing and burning.

(3) Oil and gas: PM may also be produced during the extraction, transportation and processing of oil and gas.

2. Downstream products:

(1) Plastics: The production process of many plastics requires the use of fossil fuels as raw materials, and the combustion and processing of these fossil fuels may produce PM. In addition, some plastic production process may also directly produce PM.

(2) Fertilizer: The production process of fertilizer requires the use of a large number of mineral raw materials, such as phosphate ore, potash ore, etc., which may produce PM during the processing of these ores.

(3) Coatings and Pigments: Some coatings and pigments require the use of mineral powders as raw materials, and PM may also be generated during the processing and handling of these mineral powders.

In short, the upstream and downstream related products of PM are very extensive, involving many chemicals and production raw materials. In order to reduce PM emissions and environmental impact, it is necessary to take appropriate measures to strengthen management and control.

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