The Environmental pillar of ESG examines how organizations interact with the natural world. As climate change accelerates and resource constraints intensify, environmental performance has become central to long-term business viability and financial performance.
Climate Change & Carbon Emissions
Understanding Greenhouse Gas Emissions
Carbon accounting follows the GHG Protocol, categorizing emissions into three scopes:
Scope 1: Direct Emissions
Emissions from sources owned or controlled by the company:
- Company vehicles and fleet
- On-site fuel combustion (heating, manufacturing)
- Fugitive emissions (refrigerants, leaks)
Scope 2: Indirect Energy Emissions
Emissions from purchased electricity, steam, heating, and cooling:
- Electricity purchased from the grid
- District heating/cooling systems
- Can be reduced through renewable energy procurement
Scope 3: Value Chain Emissions
All other indirect emissions in the value chain (often 70-90% of total):
- Purchased goods and services
- Business travel and employee commuting
- Transportation and distribution
- Use of sold products
- End-of-life treatment
Carbon Reduction Strategies
- Energy Efficiency: Reduce consumption through technology and process improvements
- Renewable Energy: Switch to solar, wind, hydro power sources
- Electrification: Replace fossil fuel equipment with electric alternatives
- Supply Chain Engagement: Work with suppliers to reduce Scope 3 emissions
- Carbon Offsets: Invest in verified carbon removal projects (as last resort)
Renewable Energy Transition
Renewable Energy Types
- Solar: Photovoltaic panels, concentrated solar power
- Wind: Onshore and offshore wind turbines
- Hydro: Traditional dams and run-of-river systems
- Geothermal: Heat from Earth's core
- Biomass: Organic materials (with sustainability considerations)
Corporate Renewable Energy Procurement
- Power Purchase Agreements (PPAs): Long-term contracts to buy renewable energy
- Renewable Energy Credits (RECs): Certificates representing renewable generation
- On-site Generation: Install solar panels or wind turbines
- Green Tariffs: Utility programs offering renewable energy options
Water Stewardship
Water Risk Assessment
Companies face multiple water-related risks:
- Physical Risk: Water scarcity affecting operations
- Regulatory Risk: Stricter water use regulations
- Reputational Risk: Water use in stressed regions
- Supply Chain Risk: Agricultural suppliers facing water stress
Water Management Best Practices
- Measure water consumption across all operations
- Assess water stress in operating locations (using WRI Aqueduct tool)
- Set science-based water targets
- Implement water recycling and reuse systems
- Engage with local water governance
Circular Economy & Waste Management
Linear vs. Circular Economy
Linear Economy: Take → Make → Use → Dispose
Circular Economy: Design → Use → Return → Regenerate
Circular Economy Principles
- Design for Longevity: Products built to last and be repaired
- Material Recovery: Recycle and reuse materials
- Product as Service: Lease instead of sell (e.g., lighting as a service)
- Industrial Symbiosis: One company's waste becomes another's input
- Regenerative Design: Restore natural systems
Waste Hierarchy
- Prevention: Reduce waste generation
- Reuse: Extend product life
- Recycling: Convert to new materials
- Recovery: Energy from waste
- Disposal: Landfill (last resort)
Biodiversity & Natural Capital
Why Biodiversity Matters to Business
Over half of global GDP ($44 trillion) is moderately or highly dependent on nature. Biodiversity loss threatens supply chains, operations, and markets.
Biodiversity Impact Areas
- Land Use Change: Deforestation, habitat conversion
- Pollution: Chemical runoff affecting ecosystems
- Resource Extraction: Mining, logging, fishing
- Climate Change: Shifting habitats and species ranges
- Invasive Species: Unintentional species introduction
Nature-Based Solutions
- Reforestation and afforestation
- Wetland restoration for water filtration
- Regenerative agriculture practices
- Urban green infrastructure
- Marine and coastal ecosystem protection
Pollution Prevention
Types of Pollution
- Air Pollution: Particulate matter, NOx, SOx emissions
- Water Pollution: Chemical discharge, thermal pollution
- Soil Contamination: Heavy metals, persistent chemicals
- Plastic Pollution: Single-use plastics, microplastics
- Noise and Light: Impact on ecosystems and communities
Pollution Reduction Strategies
- Source reduction and substitution
- Process optimization to minimize waste
- End-of-pipe treatment and filtration
- Closed-loop systems preventing discharge
- Regular monitoring and compliance
Environmental Metrics & Targets
Key Performance Indicators
- Carbon intensity (tCO2e per $ revenue or per unit produced)
- Renewable energy percentage
- Water withdrawal and consumption (m³)
- Waste diversion rate (% recycled or recovered)
- Land disturbance and restoration (hectares)
Science-Based Targets
The Science Based Targets initiative (SBTi) helps companies set emissions reduction targets aligned with climate science:
- 1.5°C pathway: 50% reduction by 2030 (from 2020 baseline)
- Net-zero commitment: 90% reduction by 2050
- Scope 3 inclusion required for most companies
- Independent validation of targets
Key Takeaways
- Climate change is the defining environmental challenge, requiring comprehensive carbon management
- Scope 3 emissions often comprise 70-90% of total footprint and require supply chain engagement
- Water risk varies by geography; companies must assess location-specific water stress
- Circular economy principles offer business opportunities while reducing environmental impact
- Biodiversity loss poses material risks to nature-dependent industries
- Science-based targets provide credible framework for environmental goal-setting