Every animal leaves a carbon footprint because it breathes in oxygen and exhales CO2 and also ejects methane which creates more caustic emissions than CO2. Cows and horses are particularly high emitters of methane.
Australia’s Carbon Footprint is prima facie the Average Australian's Current Carbon Footprint x the population of Australia which is 21.4 million
Carbon Footprint is measured in weight (tons or kilograms) or land area (hectares). Conservative estimates are that the planet can regenerate 3.96 tonnes equating to 1.8 global hectares per person for each of its 6.642 billion inhabitants p.a.
Methodology and formulae to calculate a Personal Carbon Footprint and a nation's Carbon Footprint.