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general:trends:emission_trends_heavy_metals [2023/03/15 14:23] – [Main drivers] kotzullageneral:trends:emission_trends_heavy_metals [2024/11/06 14:50] (current) – external edit 127.0.0.1
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 2019 and 2020 emissions saw a substantial reduction trend for most heavy metals. 2019 and 2020 emissions saw a substantial reduction trend for most heavy metals.
  
-The main sources for most heavy metals is fuel combustion:  +The main source for most heavy metals is fuel combustion and production processes:  
-Energy Industries (NFR 1.A.1) and Industrial Processes (NFR 2) like Metal Industries (NFR 2.C) emit the majority of arsenic, cadmium, chrome, lead, mercury and nickel. +**Energy Industries (NFR 1.A.1)** and **Industrial Processes (NFR 2)**, especially, of course, the Metal Industries (NFR 2.C) emit the majority of **arsenic, cadmium, chrome, lead, mercury and nickel**. 
 +  
 +In contrast, **copper and zinc** emissions are mostly governed by the **Transport (NFR 1.A.3)** sector, resulting mostly from brake and tyre wear. Thus, trends are connected directly with the annual mileage. 
  
-In contrast, copper and zinc emissions are mostly governed by the Transport (NFR 1.A.3) sector, resulting mostly from brake and tyre wear. Thus, trends are connected directly with the annual mileage. +**Selenium** on the other hand originates mainly from **Mineral Industry (NFR 2.A)** and to a lesser degree from Transport (NFR 1.A.3). 
  
-Selenium on the other hand originates mainly from Mineral Industry (NFR 2.A) and to a lesser degree from Transport (NFR 1.A.3). Other sources are still to be investigated but generally expected to add little to the total trend.+Other sources are still to be investigated but generally expected to add little to the total trend.
  
 ===== Trends ===== ===== Trends =====
 +
 The figure below shows emission trends for heavy metals: The figure below shows emission trends for heavy metals:
  
-[{{ :general:trends:iir_hm_all.png?direct&700 | Heavy metal emission trends }}]+{{ :general:trends:iir_hm_all.png?direct&800 | trends of heavy metal emissions}}