Material topics

We used the GRI Standards to identify our material topics

In 2020, we completed a comprehensive materiality assessment. Through ongoing stakeholder dialogue and an independent review, we have updated our list of material topics in 2021. We followed the newly updated GRI 3 Standard to identify and assess the significance of our impacts. As part of our 2021 materiality review, we also included consideration of all current and planned regulatory changes. In addition to those existing material topics reported in 2020, we now also consider biodiversity and community impacts at our sites of operation as material topics.

Our stakeholders are engaged in the reporting process

Our stakeholders include existing and potential employees, investors, customers, end-users of our projects, local communities where we operate and unions. In 2020, we engaged an independent ESG consultant to carry out formal stakeholder interviews, a staff survey and an independent assessment of our material topics. Responses from the interviews, survey and an analysis of the topics raised were presented to our Board of Directors who approved the material topics to report. In 2021, we maintained ongoing dialogue with our key stakeholders. Their feedback was incorporated into an independent review of our material topics and resulted in a validation of existing material topics and the addition of the two new topics - biodiversity and community impacts.

Our material topics

The following topics have been determined to be material for our 2021 Sustainability Report:

• Health and safety of our employees • Climate and emissions • Ethical business practices • Employment • Materials and recycling • Environmental impact and compliance • Biodiversity impacts • Local community impacts • Sustainable supply chain

A more detailed description of our materiality process, stakeholder feedback and definitions for material topics, is included in the appendix.