How do total national greenhouse gas emissions differ from per capita emissions?

Total national greenhouse gas emissions and per capita emissions provide different perspectives on a country's contribution to global warming.

• Total National Emissions: This metric measures the absolute quantity of greenhouse gases released within a country's borders, typically resulting from fossil fuel combustion, manufacturing, and other industrial activities. Large, highly industrialized, or populous nations often have the highest total emissions; for instance, China became the world's largest emitter in absolute terms in 2006.1
• Per Capita Emissions: This metric divides a country's total emissions by its population, reflecting the average emissions produced per person. While a country may have lower total emissions than a more populous nation, its citizens may still have higher per capita emissions if they live in highly industrialized economies with high energy consumption.1

It is important to distinguish these from a carbon footprint, which focuses on emissions associated with consumption—including imported goods—rather than just production within national borders.2