From Source to System: Understanding Scope 1, 2, and 3 Emissions - Part 1
- Kevin Bolland
- Jun 25
- 4 min read
Updated: Jun 27
Scope 1 Emissions: What They Are and Why They Matter
When people hear the term "carbon emissions," they often imagine smokestacks, vehicle exhaust, or industrial facilities releasing greenhouse gases into the atmosphere.
In many cases, these are examples of Scope 1 emissions—the most direct category of greenhouse gas emissions measured by organizations.
Scope 1 emissions are often the easiest emissions to identify because they originate from sources owned or controlled by a company. They occur as a direct result of producing a product, delivering a service, operating equipment, or maintaining facilities.
Understanding Scope 1 emissions is an important first step in environmental reporting because they represent impacts that organizations can often influence most directly. However, as we will explore throughout this series, they represent only one part of a much larger system.
What Counts as Scope 1 Emissions?
Definition
Scope 1 emissions are direct greenhouse gas emissions released from sources that are owned or controlled by an organization.
These emissions typically result from:
Fuel combustion
Company-owned vehicles
Industrial processes
On-site energy generation
Refrigerant leaks and other controlled emission sources
Because these emissions occur within an organization's operational boundary, they are generally considered the most straightforward category to measure and manage.
Key Characteristics
Scope 1 emissions:
Are released directly by the organization.
Originate from owned or controlled equipment and facilities.
Can often be measured through fuel consumption and operational records.
Represent emissions over which a company typically has the greatest degree of operational control.
Industry Example 1: Gardening, Landscaping, and Nurseries
Landscaping companies, garden centers, and nurseries may not appear to be major emitters compared to heavy industry, but they often generate direct emissions through daily operations. The act of growing plants and produce is a carbon intensive process.
Common Sources
Examples of Scope 1 emissions include:
Gasoline-powered lawn mowers
String trimmers and leaf blowers
Company-owned delivery trucks
Diesel-powered tractors and loaders
Propane-powered greenhouse equipment
On-site generators
Real-World Scenario
A landscaping company maintains parks and commercial properties throughout a city. Crews travel between sites using company-owned trucks and operate gasoline-powered equipment throughout the workday.
The fuel burned by those trucks and machines creates direct greenhouse gas emissions. Because the company owns and operates the equipment, these emissions are classified as Scope 1.
How These Emissions Are Measured
Organizations typically measure Scope 1 emissions using:
Fuel purchase records
Equipment operating hours
Fleet fuel consumption logs
Propane or natural gas usage data
Opportunities for Improvement
Potential reduction strategies include:
Transitioning to electric landscaping equipment
Improving route efficiency
Reducing equipment idle time
Replacing older engines with more efficient models
Utilizing renewable fuels where appropriate
Implementing a policy like reducing idle time can have impacts that will be measurable over time when comparing fuel costs or running hours from a period of time before the policy to the same amount of time after the policy. These small acts, over a long time can result in substantial savings for a company.
Industry Example 2: Air Travel and Aviation
The aviation industry provides one of the clearest examples of direct emissions.
Common Sources
Examples include:
Jet fuel combustion during flight
Aircraft taxiing operations
Ground support equipment owned by airlines
Maintenance facility fuel consumption
Emergency generators and support systems
Real-World Scenario
When an airline operates a flight between Los Angeles and New York, the fuel burned during takeoff, cruising, and landing produces direct greenhouse gas emissions.
Because the airline controls the aircraft and its operations, these emissions are generally reported as Scope 1 emissions.
How These Emissions Are Measured
Airlines commonly track:
Gallons of jet fuel consumed
Flight hours
Aircraft-specific fuel efficiency
Fleet operating data
Opportunities for Improvement
Potential solutions include:
More efficient aircraft designs
Sustainable aviation fuels
Improved routing and air traffic management
Aircraft weight reduction
Reduced ground operation times
Industry Example 3: Fashion and Apparel
Fashion companies are often associated with supply chains, but many still generate direct emissions through manufacturing and facility operations.
Common Sources
Examples include:
Boilers used in textile manufacturing
On-site dyeing and finishing operations
Company-owned transportation fleets
Manufacturing equipment powered by fossil fuels
Refrigerant leaks from controlled systems
Real-World Scenario
A clothing manufacturer operates a textile facility that uses natural gas boilers to heat water for fabric processing and dyeing.
The combustion of natural gas releases greenhouse gases directly from company-controlled equipment, making these Scope 1 emissions.
How These Emissions Are Measured
Organizations often use:
Natural gas consumption records
Vehicle fuel logs
Refrigerant replacement records
Opportunities for Improvement
Common strategies include:
Electrifying industrial equipment
Improving manufacturing efficiency
Switching to lower-carbon fuels
Modernizing facility infrastructure
Implementing preventative maintenance programs
Why Scope 1 Matters
Scope 1 emissions are often viewed as the most visible and controllable portion of an organization's carbon footprint.
Measuring direct emissions allows organizations to:
Establish environmental baselines
Identify operational inefficiencies
Reduce fuel consumption
Lower operating costs
Track progress toward sustainability goals
For many organizations, Scope 1 reporting serves as the foundation of broader environmental, social, and governance (ESG) programs. However, focusing exclusively on direct emissions can create an incomplete picture.
A landscaping company may replace every gasoline-powered mower with electric equipment, but the electricity used to charge those batteries still comes from somewhere. An airline may improve fuel efficiency while still relying on an extensive manufacturing and maintenance network. A clothing manufacturer may reduce on-site emissions while sourcing materials from suppliers around the world.
In each case, important impacts exist beyond what Scope 1 accounting captures.
Key Takeaway
Scope 1 emissions represent the greenhouse gases released directly from sources owned or controlled by an organization. They are often the easiest emissions to identify, measure, and manage, making them an essential starting point for environmental reporting.
Yet direct emissions tell only part of the story. Many environmental impacts occur outside a company's immediate operations, through purchased electricity, heating, cooling, and energy systems that support day-to-day activities.
In Part 2 of this series, we'll explore Scope 2 emissions and examine how indirect energy consumption can contribute significantly to an organization's overall environmental footprint.
