Want to know how green you are?
CFP = (a² x T + d-a)/7
where a is your age, T is your main mode of transport and d is your annual income.
on foot = 1
train = 2
bus = 3
car = 4
plane = 5
Between 2,000 - 3,000 is green. Around 3,000 is quite good. over 4,000 is average. over 5,000 is bad.