Key Takeaways
- A carbon footprint is the total amount of greenhouse gas emissions resulting from human activities.
- The transportation, energy, agriculture, and manufacturing sectors contribute the most to carbon emissions.
- To calculate your carbon footprint, multiply your activity data by an emissions factor.
A carbon footprint is an environmental factor we need to pay attention to because more emissions mean a greater impact on the climate. So, what is a carbon footprint and how do you calculate it? Check out the explanation below.
What Is a Carbon Footprint?
A carbon footprint is the total amount of greenhouse gas emissions generated by various human activities, both directly and indirectly. Direct emissions include combustion in various activities, while indirect emissions stem from electricity generation.
A carbon footprint includes carbon dioxide, methane, nitrous oxide, and chlorofluorocarbons (CFCs). These gases contribute to global warming and climate change.
The carbon footprint generated by each person or entity can vary depending on consumption patterns, lifestyle, location, and other factors. Statista reports that global carbon emissions from industry and fuel combustion reached 38.11 billion metric tons in 2025. Since 1990, carbon emissions have increased by more than 69%.
Furthermore, the Emissions Database for Global Atmospheric Research (EDGAR) states that China, the United States, India, the 27 European Union member states, Russia, and Indonesia were the largest contributors to greenhouse gas emissions in 2024. Combined, these countries consumed 64.2% of the world’s fuel and accounted for 61.8% of global greenhouse gas emissions.
That is why it is important to pay attention to carbon emissions so as not to further exacerbate global warming and climate change.
What Are Carbon Footprint Contributors?
Carbon footprint contributors are the parties and sectors that contribute to carbon emissions. Personal activities, such as driving gasoline-powered vehicles, contribute to carbon emissions, but industrial emissions have a far greater impact.
So, who contributes to the carbon footprint? The main sectors are transportation, energy, manufacturing, and agriculture. Here is the information:
Transportation
The transportation sector is the largest contributor to global carbon emissions. Statista explains that land transportation accounted for 74.33% of global carbon emissions in 2024, followed by international aviation (6.37%), international shipping (6.12%), domestic shipping (4.55%), other transportation (4.05%), domestic air travel (3.53%), and rail (1.05%).
Furthermore, the International Energy Agency (IEA) notes that in 2024, 60% of land transportation emissions will come from passenger cars, with the remainder from trucks, buses, motorcycles, and three-wheeled vehicles.
This sector’s carbon emissions result from burning fossil fuels such as diesel and gasoline. This process produces carbon dioxide, so the more you drive a personal vehicle, the more carbon emissions you generate.
Read also: How to Calculate Carbon Emissions and the Applications
Energy
The energy sector also contributes significantly to carbon emissions, particularly the power generation industry, which derives most of its energy from burning non-renewable sources (coal, natural gas, and petroleum). This combustion process releases carbon dioxide into the atmosphere, thereby exacerbating global warming.
The IEA reports that carbon emissions from the global energy sector increased by 0.4% in 2025, a slower rate compared to 2021. Although this increase may seem modest, emissions reached 145 million metric tons that year, about 5% higher than in 2019.
Industry and Manufacturing
Industrial processes generally generate carbon emissions, from production to product distribution. The IEA notes that industrial processes produced 40 million metric tons of carbon dioxide in 2025. Industries that contribute significantly to carbon emissions include the cement, steel, and electronics industries.
Agriculture
The agricultural sector often clears land by burning forests and shrubs, contributing carbon emissions to the atmosphere. Deforestation for land clearing also reduces the number of trees that can absorb carbon emissions, keeping those levels high.
Furthermore, the livestock sector releases methane, a gas that has a stronger global warming impact than carbon dioxide because its molecular structure vibrates more efficiently and absorbs infrared radiation, making it more effective at trapping heat.
More on this topic: Carbon Credits: Definition, Advantages, and Mechanisms
How to Calculate a Carbon Footprint
A carbon footprint is expressed in carbon dioxide equivalents (CO2e). To calculate it, multiply the data on carbon-emitting activities by the emission factor.
You can obtain activity data by identifying all activities that produce greenhouse gas emissions, whether directly or indirectly. For example, you can get your electricity consumption from your meter (usually expressed in kWh). Meanwhile, an emission factor is a coefficient that describes how much a given activity releases greenhouse gases into the atmosphere.
For example, 1 kWh of electricity has an emission factor equivalent to 0.85 kg CO2e. If you consume 200 kWh of electricity, the calculation is as follows:
Carbon footprint = activity data × emission factor = 200 kWh × 0.85 kg CO2e = 170 kg CO2e.
After calculating the carbon footprint of various activities, add up all those numbers and assess which activities need to be reduced or optimized.
If you are still confused or having trouble calculating it, you can use a free online carbon footprint calculator.
Let’s Reduce Carbon Footprint with Indonesia Asri!
To keep the Earth healthy, we need to reduce our carbon footprint, for example, by choosing low-emission transportation and conserving electricity. We also need to sort and process waste so it doesn’t pile up and cause pollution.
To start this eco-friendly habit, you can join #AksiAsri from Indonesia Asri! There are many programs you can participate in, including Operasi Semut, which helps you sort your waste before disposal.
So, let’s become a Warga Asri now and make your best contribution to keeping the Earth sustainable!
Related reading: Understanding Carbon Offset and How It Benefits the Environment
Frequently Asked Questions (FAQ)
Here are some questions about carbon footprints that you might have:
1. What Are Some Examples of Carbon Footprints in Daily Life?
Emissions from private vehicles that use fossil fuels, excessive electricity consumption, waste incineration, and industrial activities.
2. Name 3 Practical Daily Steps to Reduce Carbon Emissions!
Conserve electricity, reduce food waste, switch to public or eco-friendly transportation, and switch to renewable energy sources.
3. What Are Some Examples of Carbon Emissions?
Carbon emissions generally consist of carbon dioxide, methane, and nitrous oxide. Examples of sources of carbon emissions include open-air waste burning, electricity generated from non-renewable energy sources, the digestive processes of livestock, and others.
