Environmental indicators

This section includes indicators and GRI Standard disclosures.

Our environmental data covers our 11 main manufacturing sites, representing more than 95% of the overall environmental impact of the Company.

The methodologies used to calculate data are detailed in internal Company procedures, which are regularly reviewed during third-party environmental audits (EMAS, ISO 14001, ISO 50001).

See ST site certifications table.

ST follows the Greenhouse Gas (GHG) Protocol for managing its GHG emissions. The resulting CO₂ emissions are reported according to recognized international standards (Reference – World Resources Institute (2004) GHG Protocol – A Corporate Accounting and Reporting Standard).

Scope 1 – Direct emissions resulting from operations

• Combustion emissions: World Resources Institute (2008) – GHG Protocol Calculation tool for stationary combustion v.4.1
• PFC emissions: 2007 IPCC fourth Assessment Report Climate Change. Table 2.14. Lifetimes, radiative efficiencies and direct GWPs relative to CO₂ www.ipcc.ch

Scope 2 – Indirect emissions resulting from purchased electricity

• World Resources Institute (2014). GHG Protocol tool for stationary combustion. Version 4.8, GHG Protocol Scope 2 Guidance

Scope 3 – Emissions resulting from travel and transportation

• Mobile Combustion GHG Protocol tool v.2.6
• Supplement to the Corporate Value Chain (Scope 3) accounting and reporting standard

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Summary of net CO₂ emissions (KTons) I 305-1 I 305-2 I 305-3 I SDG 13.1

	2016	2017	2018	2019	2020
Direct emissions Scope 1	552	605	644	557	486
Indirect emissions (purchased electricity) Scope 2(1)	739	756	791	702	564
Other indirect emissions (transportation(2)) Scope 3	113	132	137	143	86
Total emissions	1,404	1,493	1,573	1,402	1,137
(1) Market-based method calculation according to GHG Protocol standard. (2) The transportation emissions value is a global estimate of employee transportation and transportation of goods.

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Environmental burden – net values SDG 3.9 - SDG 6.3

	2016	2017	2018	2019	2020
Emissions to air
Global warming(1) (MTCE)	382,909	407,290	428,912	382,277	310,041
Ozone depletion (kg R11 Eq)	0.14	0.00	0.00	0.00	0.00
VOCs (Tons)	231	287	297	139	148
Atmospheric acidification (Kg SO2 Eq)	32,283	36,084	43,856	46,018	51,207
Photochemical oxidant creation (Kg ethylene Eq)	46,186	49,166	43,749	35,799	38,295
Air emission toxicity(2) Kg PH3 Eq	2,529	1,595	2,240	1,414	3,192
Emissions to water(3)
Eutrophication (Kg (P+N))	160,155	176,555	164,027	169,575	126,286
Aquatic oxygen demand (Kg COD(4))	508,468	595,257	605,100	632,625	656,045
Heavy metals to water (Kg heavy metals)	8,217	11,560	14,222	9,233	6,880
Aquatic ecotoxicity (Kg Cu Eq)	5,114	6,208	5,764	5,211	4,290
(1) Includes direct Greenhouse Gas (GHG) emissions from our manufacturing plants and indirect emissions from energy consumption and transport, reported in Metric Tons of Carbon Equivalent (MTCE). Does not include GHG emissions from subcontractors and foundries. (2) Emissions of substances are considered only if they exceed the minimum threshold of 3ppm, expressed in phosphine equivalent. For Volatile Organic Compounds, Atmospheric Acidification, Photochemical Oxidant Creation and Air Emission Toxicity the Particulate Matter is not covered. (3) Domestic wastewater is included. (4) Total Chemical Oxygen Demand (COD).

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Consumption of energy I 302-3 I SDG 7.3
Per unit of production – normalized values

	2016	2017	2018	2019	2020
Consumption of energy	109	97	89	94	108
Baseline 100 in 2010.

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Water withdrawal by source (1000m³)⁽¹⁾ I 303-3 I SDG 6.4

	2017	2018	2019	2020
Ground water	3,055	4,236	3,029	2,880
Surface water	-	0	0	0
Municipal water supplies	14,009	13,967	15,814	17,342
Total withdrawal	17,064	18,204	18,843	20,223
(1) The sums may not add up due to rounding of the figures.

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Recycled and reused total water I 303-5 I SDG 6.3 - SDG 6.4

	2016	2017	2018	2019	2020
Total water used (1,000m3)	29,219	29,920	30,654	31,708	34,055
Total volume of water recycled and reused (1,000m3)	12,798	12,857	12,450	12,870	13,833
Water recycled and reused (%)	43.8%	43.0%	40.6%	40.6%	40.6%

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Waste in tons I 306-2 I SDG 12.4

	2016	2017	2018	2019	2020
Total hazardous waste	11,291	14,361	16,483(1)	16,877(1)	19,605
Total waste	32,979(1)	39,615(1)	44,828(1)	43,593	49,012
(1) Data corrected due to duplicated entries for recovery.

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Hazardous waste split⁽¹⁾ (%) I 306-2 I SDG 12.4

	2016	2017	2018	2019	2020
Reuse	19.1	4.1	3.1	3.1	3.5
Sent for recycling	49.7	62.7	71.8	70.9	68.0
Recovery(2)	24.6	18.5	18.3	20.0	23.8
Incineration	4.7	12.2	4.8	3.9	2.7
Landfill	1.8	2.5	2.0	2.1	2.0
(1) The sums may not add up to 100% due to rounding of the figures. (2) Waste burnt with recovery of energy (combustion).

WEEE

As a supplier of components to the electronics industry (and not a manufacturer of electronic equipment), our silicon products are not directly affected by the European Directive 2012/19/ EU Waste of Electrical and Electronic Equipment (WEEE). However, since 2018, demonstration and evaluation boards supplied by ST are subject to the Directive.

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Consumption of chemicals SDG 12.4
Per unit of production – normalized values

	2016	2017	2018	2019	2020
Consumption of chemicals	108	105	108	106	109
Baseline 100 in 2010.

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Elimination of Substances of Very High Concern (SVHC) SDG 12.4

	2016	2017	2018	2019	2020
Total number of action plans(1) completed since 2008	23	23	23	23	23
(1) One substance can be subject to several action plans to be eliminated from different ST processes.

Spills in 2020 | 306-3 |

None

Fines and non-monetary sanctions in 2020

None