Transportation: This includes emissions from personal vehicles, public transportation, air travel, and other forms of transport. The carbon footprint of transportation depends on the mode of transport, fuel efficiency, and the distance traveled.

Housing: Energy used for heating, cooling, lighting, and operating appliances in homes contributes to an individual's carbon footprint. This is influenced by the type of energy sources used, the efficiency of the home, and the behavior of the occupants.

Food: The carbon footprint of an individual's diet takes into account the GHGs emitted during the production, processing, transportation, and storage of food. Meat and dairy products, for example, typically have a higher carbon footprint than plant-based foods.

Goods and Services: The production and consumption of goods and services—from clothing to electronics to health care—have associated emissions. The carbon footprint includes the lifecycle emissions of these products, from raw material extraction to disposal.

Direct Emissions: These are emissions from sources that are owned or controlled by the company, such as emissions from combustion in owned or controlled boilers, furnaces, vehicles, etc.

Energy Indirect Emissions: Emissions from the generation of purchased electricity consumed by the company.

Other Indirect Emissions: These are all other indirect emissions that occur as a consequence of the activities of the company but occur from sources not owned or controlled by it. This includes emissions associated with the production of purchased materials, outsourced activities, waste disposal, etc.

Raw Material Extraction: The emissions associated with extracting raw materials used in the product.

Manufacturing: Emissions from the manufacturing process itself, which can vary greatly depending on the industry and technology used.

Transportation and Distribution: Emissions from transporting raw materials to the manufacturing site and finished products to the market.

Use Phase: Emissions associated with the use of the product, which is particularly relevant for products that consume energy during use, such as appliances and vehicles.

End-of-Life: Emissions associated with the disposal or recycling of the product.

Energy Production: Emissions from the production of energy, which in most countries is the largest source of GHG emissions.

Industrial Processes: Emissions from industrial processes and the use of GHG-intensive products like cement and steel.

Agriculture: Emissions from agricultural practices, including livestock and rice production, as well as the use of agricultural soils.

Waste: Emissions from waste management, including methane emissions from landfills and wastewater treatment.

Fossil Fuel Use: The global carbon footprint is heavily influenced by the combustion of fossil fuels for energy and transportation.

Deforestation: Large-scale deforestation, particularly in tropical regions, contributes significantly to global GHG emissions.

Industrial Production: Global industrial activities contribute to the carbon footprint through both direct emissions and the energy they consume.

Energy Efficiency: Improving the energy efficiency of buildings, vehicles, and appliances can significantly reduce emissions.

Renewable Energy: Switching to renewable energy sources like wind, solar, and hydro reduces the carbon footprint associated with energy use.

Sustainable Transportation: Using public transportation, biking, walking, or driving fuel-efficient or electric vehicles can lower transportation-related emissions.

Dietary Changes: Adopting a diet with less meat and more plant-based foods can reduce the carbon footprint associated with food.

Waste Reduction: Reducing, reusing, and recycling can lower emissions associated with the production and disposal of goods.

Carbon Offsetting: When emissions cannot be eliminated, carbon offsetting through reforestation projects or investments in renewable energy can compensate for the remaining footprint.