Carbon Dioxide: Why do we Measure CO2 Emissions?

Petrol and diesel engines produce carbon dioxide gas. Its chemical name is CO2. So why do we measure CO2 emissions?

The level of emissions show how much CO2 leave the exhaust pipe but also how much fuel a car’s engine uses. The amount of carbon dioxide in a car’s exhaust gases is calculated by a standard test and by law, manufacturers must make this figure known.

The results show the average amount of carbon dioxide produced for every kilometre that a car drives. How do we measure CO2 emissions?
Carbon Dioxide Emissions 

Carbon dioxide is measured in grams so the results are written as g/km CO2. In general, the lower this figure, the less fuel a vehicle uses. So a car that emits 90g/km CO2 has good fuel economy but one emitting 180g/km CO2 uses a lot of fuel.

Why is it important to know CO2 emissions? We need to discover ways of stopping CO2 changing our planet’s climate drastically!

The list of sovereign states and territories by carbon dioxide emissions due to certain forms of human activity, based on the EDGAR database created by European Commission and Netherlands Environmental Assessment Agency released in 2015 is fronted by China and US.

It lists the 2015 annual CO2emissions estimates (in thousands of CO2 tonnes) along with a list of emissions per capita (in tonnes of CO2 per year) from same source. 

The data only considers carbon dioxide emissions from the burning of fossil fuels and cement manufacture, but not emissions from land use, land-use change and forestry. 

Emissions from international shipping or bunker fuels are also not included in national figures, which can make a huge difference for small countries with important ports. The top 10 largest emitter countries account for 67.6% of the world total. 

Other powerful, more potent greenhouse gases, including methane, are not included in this data. - Daily Sun/Online Sources

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