ES PT
ES PT

Climate Change

Innovation and a collaborative ecosystem

The topic of climate change is very relevant for Nexa and is a key part of our ESG strategy. We are currently developing innovative projects in collaboration with different partners to improve our performance in the use of clean energy, the reduction of greenhouse gas emissions in operations and in the value chain.

In a recent initiative, we consolidated the implementation and use of GHG Protocol calculation tools in all operational units and corporate areas. 

The goal is to make our activities increasingly sustainable, with projects aimed at optimizing treatment and operational systems, increasing the use of renewable energy and seeking commercial agreements with suppliers of this energy model.

Emissions Reduction and Neutrality

Nexa has been reducing its Greenhouse Gas (GHG) emissions since its foundation through innovation, collaboration and the use of state-of-the-art technology, aiming to become one of the lowest carbon footprint zinc producers in the world.

In our sustainability journey and aligned with global trends, we understand the climate emergency and its potential impacts for business and society.

We have been working to build a low-carbon transition plan, a key mechanism to drive the reduction of greenhouse gas emissions and mitigate the impacts of climate change. Therefore, the participation of renewable sources in our energy matrix has been growing year by year.

And, committed to the global demands of the market and of our stakeholders, we carry out the annual publication of the Greenhouse Gas (GHG) Emissions Inventory, describing the direct and indirect emissions arising from the execution of the company’s activities.

GHG EMISSIONS in 2021

Our GHG emissions totaled 302,570.198 tCO2e in 2021, which meant a decrease of 61% compared to the previous year.

  • TOTAL GHG EMISSIONS in 2021
    302,570.198 tCO2e
  • SCOPE 1
    247,218.640 tCO2e
  • SCOPE 2¹
    7,780.928 tCO2e
  • SCOPE 3
    47,570.630 tCO2e
¹ Considering the “location-based” scope, whose emission factor is based on the interconnected electrical system at the place of consumption, emissions totaled 555,516.96 tCO2e, representing an increase of 121,051.02 tCO2e in compared to the previous year, mainly as a result of the resumption of operations that, in the previous year, had the impact of stoppage due to the Covid-19 pandemic. This year, we started to adopt the marked-based criterion, whose emission factors are specific to the type of generation technology traded in the free energy market.

 

Our Management

We maintain an active process for assessing, monitoring and updating risks as part of the environmental management system, considering all operating units and corporate areas. We perform a classification and weighting of each scenario, such as scope, nature of the activity, incidence and probability. 

 

All the identified risk scenarios are classified according to their potential impact. Starting at this point, we define an action plan for preventive and corrective mitigation measures, and, in case of unacceptable residual risks, we implement a strategic action plan to complement the reduction of impact and/or probability.

Management: Climate Risks

We have developed a climate risk matrix considering the main factors that could influence our business. The mapped scenarios include risk factors directly related to climate and socio-environmental changes, such as adverse weather conditions, excessive rainfall, floods, droughts and changes in biodiversity. The risks mapped at the operational level were also analyzed considering criteria of impact to the business and level of risk exposure (operational or strategic), in order to define the management strategy.

Learn about our initiatives

In our journey to reduce emissions we have advanced in a gradual change of the energy matrix by using renewable fuels or from clean sources and seeking commercial agreements for the use of renewable energy.

In order to achieve our goals, we have also carried out projects in collaboration with startups, universities and research centers, and started a movement that encourages our value chain with goals for the substitution of fossil fuels for renewable and clean energies.

As part of our decarbonization plan, we have several initiatives underway, among them:

Changing the energy matrix at the Cajamarquilla unit in Peru

Changing the energy matrix at the Cajamarquilla unit in Peru

Equipment powered by fossil fuels, such as LPG and diesel, was converted to natural gas.

Use of Biomass for Steam Generation in Três Marias

Use of Biomass for Steam Generation in Três Marias

The boilers that used petroleum-based oil to generate steam have been replaced by new ones, fueled by biomass from eucalyptus chips.

Hydrogen injection in automotive machinery

Hydrogen injection in automotive machinery

In Brazil, we have been conducting tests in trucks transporting zinc concentrate, in loaders at the Morro Agudo mine, and in Peru in a third party fleet transporting concentrate from Cerro Lindo.

Saiba mais sobre Inovação e outros projetos e iniciativas em desenvolvimento.

Our aspiration

To be one of the zinc producers with the lowest greenhouse gas emissions in the world, achieving the net zero target by 2050.

2030 Commitment (*)

  • Absolute reduction of scope 1 emissions by 20% (52 thousand tons of CO2 equivalent), keeping Nexa’s electrical energy matrix almost in its entirety composed of renewable sources.

2040 Commitment (**)

  • Reach neutrality of emissions by 2040.

2050 Commitment (**)

  • Reach net zero by 2050.

(*) The Aripuanã unit was not considered in the planning baseline of the goal presented, however it is included in the reduction commitment.

(**) Based on SBTi 2021 guidelines.

Check our indicators

Consumo de energia dentro da organização
Indicadores correlacionados
Dimensão GRI:
Ambiental 
Código GRI:
302-1
Setor SASB:
Mineração e Metais
Dimensão SASB:
Gestão de Energia
Código SASB:
EM-MM-510a.1
ODS:

 

Ano Consumo de Energia dentro da Organização (escopo 1 e 2) – GJ

 

 % Fontes Renováveis
2019 15.157.046,86 82,66%
2020 15.836.223,23 81,90%
2021 16.145.844,23 81,22%
Consumo de energia fora da organização
Indicadores correlacionados
Dimensão GRI:
Ambiental 
Código GRI:
302-2
Setor SASB:
Mineração e Metais
Dimensão SASB:
Gestão de Energia
Código SASB:
EM-MM-510a.1
ODS:

 

Ano Consumo de Energia fora da Organização (escopo 3) – GJ

 

 % Fontes Renováveis
2019 651.168,16 0,25%
2020 2.038.201,47 3,48%
2021 746.340,21 5,81%
Intensidade energética
Indicadores correlacionados
Dimensão GRI:
Ambiental 
Código GRI:
302-3
Setor SASB:
Mineração e Metais
Dimensão SASB:
Gestão de Energia
Código SASB:
EM-MM-510a.1
ODS:

 

Ano Intensidade Energética – GJ/ton de Zinco e Óxido de Zinco Vendidos
2019 14,75
2020 30,54
2021 27,3
Emissões diretas de gases de efeito estufa (GEE) (escopo 1)
Indicadores correlacionados
Dimensão GRI:
Ambiental
Código GRI:
305-1
Setor SASB:
Mineração e Metais
Dimensão SASB:
Emissões de Gases de Efeito Estufa
Código SASB:
EM-MM-110 a.1
Código TCFD:
MMb
ODS:
Emissões diretas de gases de efeito estufa (GEE) (escopo 1) (toneladas de CO2 equivalente (tCO2e))
2019¹ 2020² 2021³
CO2 142.159,034 237.892,010 225.936,493
CH4 42.806,125 3.380,600 5.011,496
N2O 210,970 11.141,922 9.518,270
HFC 0,000 234,531 6.752,381
Total 185.176,130 252.649,062 247.218,640

 

Emissões Diretas de Gases de Efeito Eestufa (GEE) (escopo 1) (toneladas do gás)
2019¹ 2020² 2021³
CO2 143.024,364 237.892,010 225.936,493
CH4 2.038,387 135,244 178,982
N2O 0,708 37,389 35,918
HFC 0,000 0,106 2,053

 

¹ Limites Operacionais considerados: Combustão móvel; Combustão estacionária; Resíduos sólidos e efluentes líquidos

² Limites Operacionais considerados: Combustão móvel; Combustão estacionária; Fugitivas; Processos industriais; Atividades agrícolas; Resíduos sólidos e efluentes líquido

³ Limites Operacionais considerados: Combustão móvel; Combustão estacionária; Fugitivas; Processos industriais; Atividades agrícolas; Resíduos sólido e efluentes líquidos, Mudança no uso do solo

Emissões indiretas de gases de efeito estufa (GEE) provenientes da aquisição de energia
Indicadores correlacionados
Dimensão GRI:
Ambiental
Código GRI:
305-2
Código TCFD:
MMb
ODS:

 

Emissões Indiretas de Gases de Efeito Estufa (GEE) provinientes da aquisição de Energia (toneladas de CO2 equivalente (tCO2e))
2019¹ 2020² 2021³
CO2 114.853,316 434.465,936 555.516,928
CH4 0,000 0,000 —
N2O 0,000 0,000 —
HFC 0,000 0,000 —
Total 114.853,316 — —

 

Emissões Indiretas de Gases de Efeito Estufa (GEE) provinientes da aquisição de Energia (toneladas do gás)
2019¹ 2020² 2021³
CO2 114.853,316 434.465,936  555.516,928
CH4 0,000 0,000 —
N2O 0,000 0,000 —
HFC 0,000 0,000 —

 

¹ Emissões indiretas pela compra de energia elétrica – abordagem de localização

² Aquisição de energia elétrica – abordagem de localização

³ Aquisição de energia elétrica – abordagem de localização

Outras emissões indiretas de gases de efeito estufa (GEE) (escopo 3)
Indicadores correlacionados
Dimensão GRI:
Ambiental
Código GRI:
305-3
Código TCFD:
MMb
ODS:

 

Outros Emissões Indiretas de Gases de Efeito Estufa (GEE) (escopo 3) (toneladas de CO2 equivalente (tCO2e))
2019¹ 2020² 2021³
CO2 123.529,008 84.653,399 46.699,61
CH4 0,000 811,600 429,8
N2O 0,000 811,156 441,225
HFC 0,000 0,000 —
Total 123.529,008 — —

 

Outras Emissões Indiretas de Gases de Efeito Estufa (GEE) (escopo 3) (toneladas do gás)
2019¹ 2020² 2021³
CO2 123.529,008 84.653,399 46.699,61
CH4 0,000 32,464 15,35
N2O 0,000 2,733 1,665
HFC 0,000 0,000 —

 

¹ Limites Operacionais considerados: Transporte e distribuição (upstream)

² Limites Operacionais considerados: Transporte e distribuição (upstream), Resíduos gerados nas operações, Efluentes gerados, Viagens a negócio, Deslocamento de funcionários (casa-trabalho), Transporte e distribuição (downstream)

³ Limites Operacionais considerados: Transporte e distribuição (upstream), Resíduos gerados nas operações, Viagens a negócio, Deslocamento de funcionários (casa-trabalho), Transporte e distribuição (downstream)

 

 

Intensidade de emissões de gases de efeito estufa (GEE)
Indicadores correlacionados
Dimensão GRI:
Ambiental
Código GRI:
305-4
Código TCFD:
MMb
ODS:

 

Intensidade de Emissões de GEE
2019 N/A (*)
2020 1,32 tCO2e por tonelada de zinco e óxido de zinco vendidos
2021 N/A (*)

 

N/A: dados não reportados para o período.

NOx, SOx e outras emissões atmosféricas significativas
Indicadores correlacionados
Dimensão GRI:
Ambiental
Código GRI:
305-7
Setor SASB:
Mineração e Metais
Dimensão SASB:
Qualidade do Ar
Código SASB:
EM-MM-120 a.1

 

Volume de Emissões atmosféricas significativas (toneladas) 
2019 2020 2021
NOx 250  162 289
SOx 518 666 773
Monóxido de carbono (CO) N/A* N/A* 844
Chumbo (Pb) N/A* N/A* –
Mercúrio (Hg) N/A* N/A* –
Compostos Orgânicos Voláteis (COV) – – –
Material particulado (MP) 1.150 759 952
Outras categorias-padrão de emissões atmosféricas identificadas
em regulamentos		 81 74 –

(*): dados não coletados para CO em 2019 e 2020 e não aplicável para a operação para Pb e Hg.

Discussão da estratégia de longo e curto prazo ou plano para gerenciar as emissões (escopo 1)
Indicadores correlacionados
Setor SASB:
Mineração e Metais
Dimensão SASB:
Emissões de Gases de Efeito Estufa
Código SASB:
EM-MM-110a.2
ODS:

Descarbonization Plan

To follow the carbon neutralization strategy, we have developed a decarbonization plan with a projection of emissions and reduction projects until 2030. We had the support of a consulting firm that carried out an analysis of current emissions, drew decarbonization scenarios, assisted in the definition of targets and in the economic evaluation of decarbonization alternatives. It was verified that the main focus of reduction are the scope 1 emissions, referring to fossil fuels, which represented 73% of scope 1 in 2020. As for scope 3, which started to count on the evaluation of five categories as of 2020, the best opportunity was to establish a goal for logistics suppliers. To date, 11 opportunities for decarbonization projects have been mapped, one of which is not yet included in the portfolio: purchase of proven renewable energy in Peru.

Our contribution to the SDGs

Sustainable Development Goals (SDGs)

 

In 2017 we signed a commitment to the global agenda consisting of 17 goals and 169 targets to be achieved by 2030.

 

SDGs related to the theme

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