Across the EEA-32 countries, emissions of lead have decreased by 91%, mercury by 68% and cadmium by 70% between 1990 and 2009. For each substance, the most significant sources in 2009 are from energy-related sources associated with fuel combustion, particularly from public power and heat generating facilities, and from industrial facilities.
Much progress has been made since the early 1990s in reducing point source emissions of cadmium and lead (e.g. emissions from industrial facilities). This has been achieved through improvements in for example abatement technologies for wastewater treatment, incinerators and in metal refining and smelting industries, and in some countries by the closure of older industrial facilities as a consequence of economic re-structuring.
In the case of mercury, the observed decrease in emissions may be largely attributed to improved controls on mercury cells used in industrial processes (e.g. in the chlor-alkali process) including the replacement of old mercury cells by diaphragm or membrane cells, and the general decline of coal use across Europe as a result of fuel switching.
The promotion of unleaded petrol within the EU and in other EEA member countries through a combination of fiscal and regulatory measures has been a particular success story. EU Member States have for example completely phased out the use of leaded petrol, a goal that was regulated by Directive 98/70/EC. From being the largest source of lead in 1990 when it contributed around 73% of total emissions, emissions from the road transport sector decreased since then by nearly 99%. Nevertheless, the road transport sector still remains an important source of lead, contributing around 10% of total lead emission in the EEA-32 region. However since 2002 little progress has been made in reducing emissions further; 98% of the total reduction from 1990 emissions of lead had been achieved by 2002.
Environmental context: Heavy metals (such as cadmium, lead and mercury) are recognised as being toxic to biota. All have the quality of being progressively accumulated higher up the food chain, such that chronic exposure of lower organisms to much lower concentrations can expose predatory organisms, including humans, to potentially harmful concentrations. In humans they are also of direct concern because of their toxicity, their potential to cause cancer and their potential ability to cause harmful effects at low concentrations. The relative toxic/carcinogenic potencies of heavy metals are compound specific. Specifically, exposure to heavy metals has been linked with developmental retardation, various cancers and kidney damage. Metals are persistent throughout the environment, and cadmium, lead and mercury are among those heavy metals that are already a focus of international and EU action. These substances tend not just to be confined to a given geographical region, and thus are not always open to effective local control. For example, in the case of cadmium, much is found in fine particles which do not readily dry deposit, rather having long residence times in the atmosphere and hence are subject to long-range transport processes.
EEA-32 emissions of a number of compounds categorised as persistent organic pollutants (POPs), have decreased between 1990 and 2009 – e.g. hexachlorobenzene (HCB, by 92%), hexachlorocyclohexane (HCH, by 85%), polychlorinated biphenyls (PCBs, by 75%), dioxins & furans (by 83%), and poly-aromatic hydrocarbons (PAHs, by 61%). While the majority of countries report that POPs emissions have fallen during this period, a number do report that increased emissions have occurred.
In 2009, the most significant sources of emissions for these POPs included the ‘Commercial, institutional and households’ (10% of HCB, 32% of dioxins and furans, 16% of PCBs) and ‘Industrial processes’ (70% of HCB, 32% of HCH, 27% of PCBs) sectors.
Important emission sources of PAH, include residential combustion processes (open fires, coal and wood burning for heating purposes etc), industrial metal production processes, and the road transport sector. Emissions from these sources have all declined since 1990 as a result of decreased residential use of coal, improvements in abatement technologies for metal refining and smelting, and stricter regulations on emissions from the road transport sector.
Environmental context: Persistent organic pollutants (POPs) are chemical substances that persist in the environment, have potential to bioaccumulate through the food web, and pose a risk of causing adverse effects to human health and the environment. This group of substances includes unintentional by-products of industrial processes (such as PAHs, dioxins and furans) pesticides (such as DDT), and industrial chemicals (such as polychlorinated biphenyls, PCBs). All share the property of being progressively accumulated higher up the food chain, such that chronic exposure of lower organisms to much lower concentrations can expose predatory organisms, including humans and wildlife, to potentially harmful concentrations. In humans they are also of concern for human health because of their toxicity, their potential to cause cancer and their ability to cause harmful effects at low concentrations. Their relative toxic/carcinogenic potencies are compound specific. POPs have also been shown to possess a number of toxicological properties. The major concern is often centred on their possible role in carcinogenic, immunological and reproductive effects but more recently concern has also been expressed over their possible harmful effects on human development.
The European Pollutant Release and Transfer Register (E-PRTR) is a web-based register established by Regulation (EC) No 166/2006 which implements the UNECE PRTR Protocol.
The bar graphic compares current (2005) and projected (2015 and 2030) chemicals production for 3 world regions in USD. The map precise the regions considered: OECD countries (darker blue), BRIICS countries (red), and rest of the world (pale blue).
Soil contamination requiring clean up is present at approximately 250000 sites in the EEA member countries, according to recent estimates. And this number is expected to grow. Potentially polluting activities are estimated to have occurred at nearly 3 million sites (including the 250000 sites already mentioned) and investigation is needed to establish whether remediation is required. If current investigation trends continue, the number of sites needing remediation will increase by 50% by 2025. By contrast, more than 80000 sites have been cleaned up in the last 30 years in the countries where data on remediation is available. Although the range of polluting activities (and their relative importance as localised sources of soil contamination) may vary considerably across Europe, industrial and commercial activities as well as the treatment and disposal of waste are reported to be the most important sources. National reports indicate that heavy metals and mineral oil are the most frequent soil contaminants at investigated sites, while mineral oil and chlorinated hydrocarbons are the most frequent contaminants found in groundwater. A considerable share of remediation expenditure, about 35% on average, comes from public budgets. Although considerable efforts have been made already, it will take decades to clean up a legacy of contamination.
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