Sustainability Management and Environmental, Social and Governance (ESG) Performance Summary Alliant Energy Corporation © 2021 Alliant Energy 08143MP0719 Contents Sustainability Management ......................................................................................................... 1 Who we are........................................................................................................................... 1 Our Purpose and Values .......................................................................................................... 1 Sustainability Priorities............................................................................................................ 1 Stakeholder Outreach ............................................................................................................. 2 Energy and Climate .................................................................................................................... 4 Task Force on Climate-Related Financial Disclosures.................................................................... 4 Carbon and Climate Change Governance ................................................................................... 4 Strategy ................................................................................................................................ 4 Our Clean Energy Vision....................................................................................................... 4 Planning process................................................................................................................. 5 Strategic initiatives.............................................................................................................. 6 Clean energy transition........................................................................................................ 7 Integrated grid ................................................................................................................... 8 Energy efficiency ................................................................................................................ 9 Customer renewable options...............................................................................................11 Renewable portfolio standards ............................................................................................11 Electrification adoption ......................................................................................................12 Future Net-Zero opportunities .............................................................................................13 Risk management..................................................................................................................14 Identification and reporting.................................................................................................14 Assessment and response ...................................................................................................14 Metrics and Targets ...............................................................................................................15 Planning and goals .............................................................................................................15 Research and development .................................................................................................16 Low Carbon Resources Initiative ..........................................................................................16 Energy Impact Partners.......................................................................................................17 Net-zero carbon outlook .....................................................................................................17 Environmental..........................................................................................................................18 Our Environmental Commitment .............................................................................................18 Environmental management ...................................................................................................19 © 2021 Alliant Energy 08143MP0719 Assessment program ..........................................................................................................19 Incident monitoring process ................................................................................................20 Compliance results.............................................................................................................20 Greenhouse gases .................................................................................................................21 Scope 1 emissions ..............................................................................................................21 Scope 2 emissions ..............................................................................................................22 Facility Energy Use .............................................................................................................22 Thermal air emissions ............................................................................................................24 Air emissions sources .........................................................................................................24 Goals and reductions achieved ............................................................................................24 Water management ..............................................................................................................28 Water use sources .............................................................................................................28 Goals and reductions achieved ............................................................................................29 Planning, risks, and resilience ..............................................................................................29 Coal combustion residuals ......................................................................................................31 Management and compliance..............................................................................................31 Beneficial use highlights......................................................................................................32 Surface impoundments.......................................................................................................32 Waste management ..............................................................................................................33 General waste sources........................................................................................................33 Goals and reductions achieved ............................................................................................33 Waste vendor audit process ................................................................................................33 Ecosystem and habitat ...........................................................................................................34 Initiatives and support ........................................................................................................34 Tree planting programs ......................................................................................................34 Avian Protection Plan .........................................................................................................35 Minimizing construction impacts..........................................................................................36 Natural species and protected areas .....................................................................................36 Envision recognition ..............................................................................................................37 Social ......................................................................................................................................39 Cyber and physical security.....................................................................................................39 Programs and management ................................................................................................39 © 2021 Alliant Energy 08143MP0719 Business continuity ............................................................................................................41 Human capital ......................................................................................................................42 Programs and management ................................................................................................42 Human rights policy ...........................................................................................................42 Total rewards ....................................................................................................................43 Diversity, Equity and Inclusion .............................................................................................43 Talent development and workforce readiness ........................................................................45 Health and wellness ...........................................................................................................45 Collective bargaining and labor relations ...............................................................................45 Employee and contractor safety ..............................................................................................46