Which of the following statements about carbon footprint are correct?
A.
Your carbon footprint is the sum of all emissions of CO₂, which were induced by your activities in a given time frame. Usually a carbon footprint is calculated for the time period of a year.
B.
The world-wide average is 4 tons of CO₂ per person per year; the average of all industrialized nations is about 11 tons of CO₂ per person per year (2002).
C.
Few people express their carbon footprint in kg carbon rather than kg CO₂. You can always convert kg CO₂ in kg carbon by multiplying with a factor 0.27.
D.
If you personally want to contribute to stop global warming, the calculation and constant monitoring of your personal carbon footprint is essential.